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 A010808 20th powers: a(n) = n^20. 6
 0, 1, 1048576, 3486784401, 1099511627776, 95367431640625, 3656158440062976, 79792266297612001, 1152921504606846976, 12157665459056928801, 100000000000000000000, 672749994932560009201, 3833759992447475122176 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (21, -210, 1330, -5985, 20349, -54264, 116280, -203490, 293930, -352716, 352716, -293930, 203490, -116280, 54264, -20349, 5985, -1330, 210, -21, 1). FORMULA Totally multiplicative sequence with a(p) = p^20 for prime p. Multiplicative sequence with a(p^e) = p^(20e). - Jaroslav Krizek, Nov 01 2009 From Ilya Gutkovskiy, Feb 27 2017: (Start) Dirichlet g.f.: zeta(s-20). Sum_{n>=1} 1/a(n) = 174611*Pi^20/1531329465290625 = A013678. (End) Sum_{n>=1} (-1)^(n+1)/a(n) = 524287*zeta(20)/524288 = 91546277357*Pi^20/802857662698291200000. - Amiram Eldar, Oct 09 2020 MATHEMATICA Table[n^20, {n, 0, 20}] (* Amiram Eldar, Oct 09 2020 *) PROG (Magma) [n^20: n in [0..15]]; // Vincenzo Librandi, Jun 19 2011 CROSSREFS Cf. A013678. Sequence in context: A016810 A016906 A017704 * A016966 A017038 A017122 Adjacent sequences: A010805 A010806 A010807 * A010809 A010810 A010811 KEYWORD nonn,mult,easy AUTHOR STATUS approved

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Last modified December 6 09:32 EST 2022. Contains 358608 sequences. (Running on oeis4.)