bash-2.05a$ time ./den3 400000 
[9,15,16]
[21,55,56]
[31,56,59]
[35,119,120]
[40,71,75]
[49,139,141]
[62,103,110]
[85,91,111]
[101,291,295]
[120,155,176]
[137,533,536]
[150,430,436]
[188,202,246]
[220,516,529]
[231,904,909]
[249,451,475]
[253,425,453]
[273,689,703]
[291,1431,1435]
[305,696,715]
[315,528,563]
[325,664,689]
[328,337,419]
[350,714,741]
[363,416,493]
[368,1437,1445]
[379,791,819]
[400,589,645]
[425,449,551]
[425,706,754]
[435,496,589]
[439,2165,2171]
[490,870,919]
[505,1630,1646]
[529,3139,3144]
[533,644,748]
[609,755,869]
[704,1065,1159]
[730,3596,3606]
[743,4416,4423]
[751,1691,1739]
[776,951,1099]
[799,1819,1869]
[835,2959,2981]
[854,2418,2453]
[856,1344,1451]
[869,6035,6041]
[879,1045,1221]
[898,1622,1709]
[923,1287,1429]
[969,1002,1242]
[1090,2774,2829]
[1104,2515,2584]
[1106,2304,2386]
[1140,2116,2221]
[1147,2073,2184]
[1161,8071,8079]
[1272,7555,7567]
[1329,10569,10576]
[1352,1479,1787]
[1485,2585,2739]
[1485,3095,3205]
[1610,1942,2257]
[1711,13616,13625]
[1776,2955,3155]
[1927,17263,17271]
[2030,14106,14120]
[2100,3212,3487]
[2117,4581,4727]
[2201,3661,3909]
[2253,6391,6483]
[2411,21609,21619]
[2479,2727,3287]
[2681,26711,26720]
[2913,4839,5168]
[2949,4409,4811]
[2952,10185,10267]
[3040,24185,24201]
[3139,4631,5069]
[3279,32680,32691]
[3571,7155,7440]
[3609,39579,39589]
[3654,21538,21573]
[4016,8911,9175]
[4116,8035,8380]
[4333,47531,47543]
[4338,38872,38890]
[4482,18974,19057]
[4607,14519,14672]
[4729,56605,56616]
[4748,13682,13870]
[4754,13490,13684]
[5301,7285,8121]
[5339,5609,6901]
[5357,14280,14527]
[5591,66936,66949]
[5631,7106,8130]
[5960,59391,59411]
[6059,78599,78611]
[6153,6587,8035]
[6341,6789,8281]
[6635,17395,17711]
[6969,16813,17203]
[6992,29203,29336]
[7007,19881,20167]
[7063,8095,9593]
[7071,91741,91755]
[7105,7848,9443]
[7224,13047,13747]
[7295,10619,11661]
[7520,26129,26335]
[7617,106443,106456]
[7843,10169,11533]
[7942,87110,87132]
[8131,18033,18568]
[8177,27553,27791]
[8275,10150,11726]
[8336,40053,40173]
[8791,122864,122879]
[9051,11101,12825]
[9421,141091,141105]
[9729,43584,43745]
[9861,16016,17176]
[9897,28515,28907]
[10320,123541,123565]
[10424,46361,46536]
[10647,23143,23871]
[10769,161295,161311]
[11066,13166,15379]
[11119,17457,18847]
[11193,16147,17771]
[11434,116029,116066]
[11489,183569,183584]
[11515,81795,81871]
[11551,101339,101389]
[11945,14211,16600]
[11990,14685,16974]
[12137,45425,45712]
[12167,20943,22231]
[12215,20296,21675]
[13023,208096,208113]
[13130,170340,170366]
[13688,15135,18203]
[13839,234975,234991]
[13925,25681,26979]
[13939,18011,20449]
[14245,37302,37982]
[14314,17542,20272]
[14645,42197,42777]
[14767,34143,35040]
[15128,25135,26843]
[15571,264401,264419]
[15685,23445,25584]
[16408,229307,229335]
[16489,296479,296496]
[17963,262667,262695]
[18220,70885,71284]
[18297,48411,49267]
[18317,52208,52949]
[18377,23318,26630]
[18431,331416,331435]
[18499,45436,46436]
[18634,27854,30395]
[18759,28545,31024]
[19056,32011,34120]
[19109,26565,29520]
[19152,33901,35827]
[19457,369323,369341]
[19875,49495,50541]
[19966,33167,35422]
[20190,302386,302416]
[20943,28457,31824]
[21011,67090,67770]
[21224,57443,58393]
[21624,72479,73115]
[22120,83769,84280]
[22285,37355,39831]
[22533,55677,56881]
[24312,33733,37505]
[24512,391665,391697]
[24644,54281,55924]
[26011,46982,49502]
[26149,27625,33901]
[27220,27967,34772]
[27677,30653,36841]
[28245,60264,62265]
[28651,374130,374186]
[29657,74096,75647]
[29891,33825,40291]
[30955,121143,121813]
[30963,120467,121145]
[31717,35125,42217]
[32264,84491,86031]
[33196,111927,112892]
[33235,60029,63249]
[33549,103315,104481]
[35454,67263,70398]
[35799,120159,121209]
[37444,56260,61320]
[38472,192473,192984]
[39155,111065,112664]
[39253,45202,53466]
[39320,206089,206565]
[39633,129167,130399]
[39714,76430,79849]
[39817,227453,227859]
[40480,129261,130571]
[40921,86360,89320]
[41029,59645,65519]
[41107,84768,87875]
[41614,60570,66515]
[42559,134386,135794]
[42732,161758,162746]
[43281,56221,63725]
[43616,67088,72743]
[44145,103884,106476]
[44607,205680,206377]
[45714,122359,124450]
[46509,121793,124013]
[46564,71100,77216]
[47157,282283,282721]
[47252,117668,120155]
[47329,106295,109335]
[47618,192942,193904]
[48280,127675,129936]
[48416,299555,299976]
[48859,51205,63071]
[48909,71189,78176]
[49183,191352,192429]
[50505,92071,96881]
[50547,58563,69104]
[51781,67117,76127]
[52206,90950,96356]
[52436,205204,206339]
[52504,66265,75811]
[52597,65279,75107]
[54690,155968,158178]
[55944,222856,224025]
[58135,73371,83941]
[60061,317681,318395]
[60077,66165,79712]
[61203,178997,181351]
[61491,196351,198341]
[62013,143976,147713]
[62679,91104,100080]
[62951,187095,189441]
[62954,65685,81074]
[63536,65747,81467]
[64414,68020,83490]
[64459,156099,159680]
[64505,66749,82709]
[65428,94392,103884]
[65485,295239,296309]
[65703,72712,87419]
[66199,128269,133896]
[66991,147559,152025]
[67127,167163,170696]
[67601,85069,97419]
[68405,172641,176149]
[69505,320489,321575]
[70260,114639,122836]
[72410,134126,140821]
[73955,214775,217659]
[74824,149189,155216]
[76621,110539,121655]
[77185,280480,282415]
[79990,86151,104806]
[80401,105409,119136]
[80444,177310,182666]
[80709,192619,197231]
[80771,268256,270675]
[82295,105403,120008]
[83391,326347,328152]
[83765,139153,148613]
[85063,288631,291073]
[85618,156654,164753]
[88648,238817,242821]
[90220,192220,198629]
[90849,122616,137389]
[91635,201840,207949]
[91862,153978,164185]
[92873,103597,124136]
[96837,192741,200567]
[98455,151139,163949]
[99385,114745,135584]
[99875,339564,342420]
[100467,108603,131905]
[100555,103379,128495]
[101609,261120,266151]
[103589,293847,298077]
[103731,172320,184035]
[104205,163230,176310]
[104424,285011,289609]
[104873,186351,196823]
[105469,163535,177016]
[105995,200584,210001]
[106080,375912,378707]
[106149,156304,171165]
[106344,162854,176750]
[107955,191296,202131]
[110139,155855,172376]
[114071,203720,215005]
[114080,130736,154935]
[114147,191333,204016]
[114531,149985,169576]
[117409,254296,262379]
[117924,318494,323794]
[118730,165554,183820]
[121143,138831,164528]
[121433,250415,259593]
[126023,368577,373424]
[126430,287391,295326]
[127109,188696,206240]
[127800,141449,170051]
[136849,227330,242786]
[137983,312472,321195]
[142217,223295,241072]
[145543,376567,383679]
[146901,338261,347255]
[148463,385152,392369]
[153405,187991,217251]
[157661,381800,390559]
[162540,335183,347468]
[162656,256035,276275]
[163703,190937,224719]
[167719,205533,237523]
[177467,266988,290916]
[178809,340691,356376]
[181425,375754,389354]
[181881,279424,303056]
[186877,257413,286769]
[186886,195650,241109]
[187739,307349,329120]
[192108,370272,386764]
[202539,228463,272493]
[208507,286043,319024]
[209235,377929,398200]
[211721,367061,389181]
[218821,276835,316464]
[220939,262851,307039]
[229297,276698,321530]
[230324,273706,319854]
[243987,385005,415232]
[245365,310895,355219]
[246974,308066,353839]
[264033,323576,373933]
[271264,281791,348529]
[277425,324584,381555]
[299216,321469,391509]
[349084,393908,469753]
[374830,378416,474526]
total 351 solutions

real      2013m20.502s
user        1999m26.537s
sys 0m6.128s

bash-2.05a$