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A255187
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29-gonal numbers: a(n) = n*(27*n-25)/2.
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11
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0, 1, 29, 84, 166, 275, 411, 574, 764, 981, 1225, 1496, 1794, 2119, 2471, 2850, 3256, 3689, 4149, 4636, 5150, 5691, 6259, 6854, 7476, 8125, 8801, 9504, 10234, 10991, 11775, 12586, 13424, 14289, 15181, 16100, 17046, 18019, 19019, 20046, 21100
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OFFSET
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0,3
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COMMENTS
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REFERENCES
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E. Deza and M. M. Deza, Figurate numbers, World Scientific Publishing (2012), page 6 (27th row of the table).
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LINKS
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FORMULA
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G.f.: x*(-1 - 26*x)/(-1 + x)^3.
Product_{n>=2} (1 - 1/a(n)) = 27/29. - Amiram Eldar, Jan 22 2021
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MATHEMATICA
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Table[n (27 n - 25)/2, {n, 40}]
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PROG
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CROSSREFS
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Cf. similar sequences listed in A255184.
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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