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A002414 Octagonal pyramidal numbers: n(n+1)(2n-1)/2.
(Formerly M4609 N1966)
+0
17
1, 9, 30, 70, 135, 231, 364, 540, 765, 1045, 1386, 1794, 2275, 2835, 3480, 4216, 5049, 5985, 7030, 8190, 9471, 10879, 12420, 14100, 15925, 17901, 20034, 22330, 24795, 27435, 30256, 33264, 36465, 39865, 43470, 47286, 51319, 55575, 60060, 64780 (list; graph; listen)
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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.


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