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A002413 Heptagonal (or 7-gonal) pyramidal numbers: n(n+1)(5n-2)/6.
(Formerly M4498 N1904)
+0
9
1, 8, 26, 60, 115, 196, 308, 456, 645, 880, 1166, 1508, 1911, 2380, 2920, 3536, 4233, 5016, 5890, 6860, 7931, 9108, 10396, 11800, 13325, 14976, 16758, 18676, 20735, 22940, 25296, 27808, 30481, 33320, 36330, 39516, 42883, 46436, 50180, 54120 (list; graph; listen)
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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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