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A005449 Second pentagonal numbers: n*(3n+1)/2. +0
44
0, 2, 7, 15, 26, 40, 57, 77, 100, 126, 155, 187, 222, 260, 301, 345, 392, 442, 495, 551, 610, 672, 737, 805, 876, 950, 1027, 1107, 1190, 1276, 1365, 1457, 1552, 1650, 1751, 1855, 1962, 2072, 2185, 2301, 2420, 2542, 2667, 2795, 2926, 3060, 3197, 3337, 3480 (list; graph; listen)
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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.


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