A013850 a(n) = 9^(5*n + 1).

9, 531441, 31381059609, 1853020188851841, 109418989131512359209, 6461081889226673298932241, 381520424476945831628649898809, 22528399544939174411840147874772641, 1330279464729113309844748891857449678409

Offset

0,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..100

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (59049).

Formula

From Wesley Ivan Hurt, Jan 02 2022: (Start)

G.f.: 9/(1-59049*x).

E.g.f.: 9*exp(59049*x).

a(n) = 59049*a(n-1).

a(n) = A001019(A016861(n)). (End)

Mathematica

Table[9^(5 n + 1), {n, 0, 12}] (* Wesley Ivan Hurt, Jan 02 2022 *)

Prog

(Magma) [9^(5*n+1): n in [0..15]]; // Vincenzo Librandi, Jul 08 2011
(Maxima) makelist(9^(5*n+1), n, 0, 20); /* Martin Ettl, Oct 21 2012 */
(PARI) a(n) = 9^(5*n+1); \\ Altug Alkan, Sep 08 2018

Crossrefs

Cf. A001019, A016861.

Sequence in context: A225069 A058468 A133414 * A174001 A273234 A259159

Adjacent sequences: A013847 A013848 A013849 * A013851 A013852 A013853

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved