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 A267217 10-gonal (or decagonal) numbers with prime indices. 0
 10, 27, 85, 175, 451, 637, 1105, 1387, 2047, 3277, 3751, 5365, 6601, 7267, 8695, 11077, 13747, 14701, 17755, 19951, 21097, 24727, 27307, 31417, 37345, 40501, 42127, 45475, 47197, 50737, 64135, 68251, 74665, 76867, 88357, 90751, 98125, 105787, 111055, 119197, 127627, 130501, 145351, 148417, 154645 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Eric Weisstein's World of Mathematics, Decagonal Number Eric Weisstein's World of Mathematics, Prime Number FORMULA a(n) = prime(n)*(4*prime(n) - 3) = A000040(n)*(4*A000040(n) - 4). a(n) = A001107(A000040(n)). a(n) = sigma_0(48^(prime(n) - 1)) = A000005(A009992(A000040(n) - 1)). MATHEMATICA Table[Prime[n] (4 Prime[n] - 3), {n, 1, 45}] PROG (PARI) lista(nn) = forprime(p=2, nn, print1(p*(4*p-3), ", ")); \\ Altug Alkan, Jan 12 2016 CROSSREFS Cf. A000040, A001107, A001248, A034953, A116995, A117961, A267144. Sequence in context: A103135 A220021 A008468 * A179546 A119548 A219629 Adjacent sequences:  A267214 A267215 A267216 * A267218 A267219 A267220 KEYWORD nonn,easy AUTHOR Ilya Gutkovskiy, Jan 12 2016 STATUS approved

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Last modified April 5 12:34 EDT 2020. Contains 333241 sequences. (Running on oeis4.)