A013808 a(n) = 18^(4*n + 1).

18, 1889568, 198359290368, 20822964865671168, 2185911559738696531968, 229468251895129407139872768, 24088659210943104643915283693568, 2528731089327963353099650821015994368, 265456074833292280954988944586975024775168

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 (104976).

Mathematica

18^(4*Range[0, 20]+1) (* or *) NestList[104976#&, 18, 20] (* Harvey P. Dale, Jun 19 2021 *)

Prog

(Magma) [18^(4*n+1): n in [0..15]]; // Vincenzo Librandi, Jul 06 2011
(Maxima) makelist(18^(4*n+1), n, 0, 20); /* Martin Ettl, Oct 21 2012 */
(PARI) a(n) = 18^(4*n+1); \\ Altug Alkan, Sep 08 2018

Crossrefs

Sequence in context: A215577 A071098 A259164 * A115479 A144838 A013886

Adjacent sequences: A013805 A013806 A013807 * A013809 A013810 A013811

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved