A013781 a(n) = 4^(4*n + 3).

64, 16384, 4194304, 1073741824, 274877906944, 70368744177664, 18014398509481984, 4611686018427387904, 1180591620717411303424, 302231454903657293676544, 77371252455336267181195264, 19807040628566084398385987584

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn

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 (256).

Crossrefs

Cf. A013721.

Programs

Magma

[4^(4*n+3): n in [0..15]]; // Vincenzo Librandi, Jun 04 2011

Maxima

makelist(4^(4*n+3),n,0,20); /* Martin Ettl, Oct 21 2012 */

PARI

a(n) = 4^(4*n+3); \\ Altug Alkan, Sep 08 2018

Formula

From Philippe Deléham, Nov 27 2008: (Start)

a(n) = 256*a(n-1); a(0)=64.

G.f.: 64/(1-256*x).

a(n) = 4*A013721(n). (End)