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A051942 Truncated triangular numbers: a(n)=n*(n+1)/2-3*t*(t+1)/2, t=5. +0
4
0, 10, 21, 33, 46, 60, 75, 91, 108, 126, 145, 165, 186, 208, 231, 255, 280, 306, 333, 361, 390, 420, 451, 483, 516, 550, 585, 621, 658, 696, 735, 775, 816, 858, 901, 945, 990, 1036, 1083, 1131, 1180, 1230, 1281, 1333, 1386, 1440, 1495, 1551, 1608, 1666 (list; graph; listen)
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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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