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 A224384 a(n) = 1 + 17^n. 2
 2, 18, 290, 4914, 83522, 1419858, 24137570, 410338674, 6975757442, 118587876498, 2015993900450, 34271896307634, 582622237229762, 9904578032905938, 168377826559400930, 2862423051509815794, 48661191875666868482, 827240261886336764178, 14063084452067724991010 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Sum of n-th powers of divisors of 17. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 Index entries for linear recurrences with constant coefficients, signature (18,-17). FORMULA a(n) = A001026(n) + 1. G.f.: 1/(1-x) + 1/(1-17*x). E.g.f.: exp(x) + exp(17*x). a(n) = 18*a(n-1) - 17*a(n-2) with a(0) = 2, a(1) = 18. MATHEMATICA 17^Range[0, 20]+1 (* Harvey P. Dale, Jul 19 2019 *) CROSSREFS Cf. A001026. Similar sequences: A000051, A034472, A001576, A034474, A034488, A034491, A034496, A034513, A034517, A034524, A034660, A141012, A141013, A141014, A020514, A034661, A034662, A034663, A034664, A034665, A034666, A034667, A034668, A034669, A020516, A034671, A034672, A034673, A034674, A034675. Sequence in context: A084947 A123385 A121564 * A092563 A258922 A192555 Adjacent sequences:  A224381 A224382 A224383 * A224385 A224386 A224387 KEYWORD nonn,easy AUTHOR Philippe Deléham, Apr 05 2013 STATUS approved

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Last modified February 17 15:32 EST 2020. Contains 331998 sequences. (Running on oeis4.)