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 A199031 a(n) = 2*12^n-1. 1
 1, 23, 287, 3455, 41471, 497663, 5971967, 71663615, 859963391, 10319560703, 123834728447, 1486016741375, 17832200896511, 213986410758143, 2567836929097727, 30814043149172735, 369768517790072831, 4437222213480873983 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..900 Index entries for linear recurrences with constant coefficients, signature (13,-12). FORMULA a(n) = 12*a(n-1)+11. a(n) = 13*a(n-1)-12*a(n-2). G.f.: (1+10*x)/((1-x)*(1-12*x)). - Bruno Berselli, Nov 03 2011 MATHEMATICA LinearRecurrence[{13, -12}, {1, 23}, 40] (* Harvey P. Dale, Feb 21 2013 *) PROG (Magma) [2*12^n-1: n in [0..20]]; CROSSREFS Sequence in context: A010975 A022588 A268992 * A125435 A086943 A131273 Adjacent sequences: A199028 A199029 A199030 * A199032 A199033 A199034 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Nov 03 2011 STATUS approved

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Last modified March 4 02:53 EST 2024. Contains 370522 sequences. (Running on oeis4.)