info prev up next book cdrom email home

Heptagonal Pyramidal Number

A Pyramidal Number of the form $n(n+1)(5n-2)/6$, The first few are 1, 8, 26, 60, 115, ... (Sloane's A002413). The Generating Function for the heptagonal pyramidal numbers is



Sloane, N. J. A. Sequence A002413/M4498 in ``An On-Line Version of the Encyclopedia of Integer Sequences.'' and Sloane, N. J. A. and Plouffe, S. The Encyclopedia of Integer Sequences. San Diego: Academic Press, 1995.

© 1996-9 Eric W. Weisstein