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 A005052 a(n) = 10*3^n. 4
 10, 30, 90, 270, 810, 2430, 7290, 21870, 65610, 196830, 590490, 1771470, 5314410, 15943230, 47829690, 143489070, 430467210, 1291401630, 3874204890, 11622614670, 34867844010, 104603532030, 313810596090, 941431788270, 2824295364810, 8472886094430 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..300 Tanya Khovanova, Recursive Sequences Index entries for linear recurrences with constant coefficients, signature (3). FORMULA From Elmo R. Oliveira, Aug 14 2024: (Start) G.f.: 10/(1-3*x). E.g.f.: 10*exp(3*x). a(n) = 3*a(n-1), n > 0. (End) MATHEMATICA 10*3^Range[0, 60] (* Vladimir Joseph Stephan Orlovsky, Jun 09 2011 *) PROG (Magma) [10*3^n: n in [0..30]]; // Vincenzo Librandi, Jun 10 2011 (PARI) a(n)=10*3^n \\ Charles R Greathouse IV, Oct 07 2015 CROSSREFS Except for initial terms, same as A062107. Sequence in context: A229466 A269261 A328259 * A057344 A115134 A245428 Adjacent sequences: A005049 A005050 A005051 * A005053 A005054 A005055 KEYWORD nonn,easy AUTHOR N. J. A. Sloane STATUS approved

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Last modified September 15 15:02 EDT 2024. Contains 375938 sequences. (Running on oeis4.)