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 A155604 6^n+3^n-1. 10
 1, 8, 44, 242, 1376, 8018, 47384, 282122, 1686176, 10097378, 60525224, 362974202, 2177313776, 13062288338, 78368947064, 470199333482, 2821152954176, 16926788584898, 101560344088904, 609360902271962, 3656161926847376 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Index entries for linear recurrences with constant coefficients, signature (10,-27,18). FORMULA G.f.: 1/(1-6*x)+1/(1-3*x)-1/(1-x). E.g.f.: e^(6*x)+e^(3*x)-e^x. a(n)=9*a(n-1)-18*a(n-2)-10 with a(0)=1, a(1)=8 - Vincenzo Librandi, Jul 21 2010 PROG (PARI) a(n)=6^n+3^n-1 \\ Charles R Greathouse IV, Jun 11 2015 CROSSREFS Cf. A074501, A020515, A155588, A155590, A155592, A155593, A155594, A155596, A155597, A155598, A155599, A155600, A155601, A155602, A155603. Sequence in context: A249794 A322498 A147828 * A126476 A220629 A210118 Adjacent sequences:  A155601 A155602 A155603 * A155605 A155606 A155607 KEYWORD nonn,easy AUTHOR Mohammad K. Azarian, Jan 25 2009 STATUS approved

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Last modified September 28 07:38 EDT 2020. Contains 337394 sequences. (Running on oeis4.)