Octagonal Number


A polygonal number of the form O_n=n(3n-2). The first few are 1, 8, 21, 40, 65, 96, 133, 176, ... (OEIS A000567). The generating function for the octagonal numbers is


See also

Octagonal Heptagonal Number, Octagonal Hexagonal Number, Octagonal Pentagonal Number, Octagonal Square Number, Octagonal Triangular Number

Explore with Wolfram|Alpha


Sloane, N. J. A. Sequence A000567/M4493 in "The On-Line Encyclopedia of Integer Sequences."

Referenced on Wolfram|Alpha

Octagonal Number

Cite this as:

Weisstein, Eric W. "Octagonal Number." From MathWorld--A Wolfram Web Resource.

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