Decagonal Number
المؤلف:
Sloane, N. J. A.
المصدر:
Sequences A001107/M4690, A028993, and A028994 in "The On-Line Encyclopedia of Integer Sequences."
الجزء والصفحة:
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16-12-2020
1284
Decagonal Number
A figurate number of the form 
. The first few are 1, 10, 27, 52, 85, ... (OEIS 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).
REFERENCES:
Sloane, N. J. A. Sequences A001107/M4690, A028993, and A028994 in "The On-Line Encyclopedia of Integer Sequences."
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