A figurate number of the form A001107 ).
The generating function giving the decagonal
numbers is
The first few odd decagonal numbers are 1, 27, 85, 175, 297, ... (OEIS A028993 ), and the first few even decagonal numbers are 10, 52, 126, 232, 370, 540, ... (OEIS
A028994 ).
See also Decagon ,
Figurate
Number
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References Sloane, N. J. A. Sequences A001107 /M4690, A028993 , and A028994
in "The On-Line Encyclopedia of Integer Sequences." Referenced
on Wolfram|Alpha Decagonal Number
Cite this as:
Weisstein, Eric W. "Decagonal Number."
From MathWorld https://mathworld.wolfram.com/DecagonalNumber.html
Subject classifications
.
The first few are 1, 10, 27, 52, 85, ... (OEIS A001107).
The generating function giving the decagonal
numbers is
