A013728 a(n) = 23^(2*n + 1).

23, 12167, 6436343, 3404825447, 1801152661463, 952809757913927, 504036361936467383, 266635235464391245607, 141050039560662968926103, 74615470927590710561908487, 39471584120695485887249589623

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

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 (529).

Crossrefs

Cf. A013708-A013727, A013729.

Programs

Magma

[23^(2*n+1): n in [0..15]]; // Vincenzo Librandi, Jun 26 2011

Maple

seq(23^(2*n+1),n=0..10); # Nathaniel Johnston, Jun 26 2011

Mathematica

NestList[529#&,23,15] (* Harvey P. Dale, Jan 17 2012 *)

PARI

a(n)=23^(2*n+1) \\ Charles R Greathouse IV, Jul 11 2016

Formula

From Philippe Deléham, Nov 28 2008: (Start)

a(n) = 529*a(n-1); a(0)=23.

G.f.: 23/(1-529*x). (End)