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 A013786 a(n) = 7^(4*n + 1). 2
 7, 16807, 40353607, 96889010407, 232630513987207, 558545864083284007, 1341068619663964900807, 3219905755813179726837607, 7730993719707444524137094407, 18562115921017574302453163671207, 44567640326363195900190045974568007 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 Tanya Khovanova, Recursive Sequences Index entries for linear recurrences with constant coefficients, signature (2401). FORMULA From Philippe Deléham, Dec 02 2008 : (Start) a(n) = 2401*a(n-1); a(0)=7. G.f.: 7/(1-2401*x). a(n) = A013787(n)/49. (End) PROG (MAGMA) [7^(4*n+1): n in [0..15]]; // Vincenzo Librandi, Jun 28 2011 (PARI) a(n)=7^(4*n+1) \\ Charles R Greathouse IV, Jul 11 2016 CROSSREFS Subsequence of A000420. Sequence in context: A203685 A134645 A115997 * A285178 A072050 A249765 Adjacent sequences:  A013783 A013784 A013785 * A013787 A013788 A013789 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified November 13 17:16 EST 2018. Contains 317149 sequences. (Running on oeis4.)