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 A074624 a(n) = 8^n + 9^n. 40
 2, 17, 145, 1241, 10657, 91817, 793585, 6880121, 59823937, 521638217, 4560526225, 39970994201, 351149013217, 3091621642217, 27274838966065, 241075504183481, 2134495165562497, 18928981513351817, 168109033806481105 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Index entries for linear recurrences with constant coefficients, signature (17,-72). FORMULA From Mohammad K. Azarian, Jan 11 2009: (Start) G.f.: 1/(1-8*x) + 1/(1-9*x). E.g.f.: e^(8*x) + e^(9*x). (End) a(n) = 17*a(n-1) - 72*a(n-2) with a(0)=2, a(1)=17. - Vincenzo Librandi, Jul 21 2010 MATHEMATICA Table[8^n + 9^n, {n, 0, 20}] PROG (PARI) a(n)=8^n+9^n \\ Charles R Greathouse IV, Apr 08 2016 CROSSREFS Cf. A000051, A034472, A052539, A034474, A062394, A034491, A062395, A062396, A007689, A063376, A063481, A074600..A074623. Sequence in context: A163066 A110815 A273340 * A245807 A295946 A176934 Adjacent sequences:  A074621 A074622 A074623 * A074625 A074626 A074627 KEYWORD easy,nonn AUTHOR Robert G. Wilson v, Aug 26 2002 STATUS approved

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Last modified October 15 20:04 EDT 2019. Contains 328037 sequences. (Running on oeis4.)