A013721 a(n) = 16^(2*n + 1).

16, 4096, 1048576, 268435456, 68719476736, 17592186044416, 4503599627370496, 1152921504606846976, 295147905179352825856, 75557863725914323419136, 19342813113834066795298816, 4951760157141521099596496896

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 (256).

Formula

From Philippe Deléham, Nov 27 2008: (Start)

a(n) = 256*a(n-1); a(0)=16.

G.f.: 16/(1-256*x).

a(n) = 4*A013780(n). (End)

Mathematica

NestList[256#&, 16, 20] (* Harvey P. Dale, Oct 28 2015 *)

Prog

(Magma) [16^(2*n+1): n in [0..15]]; // Vincenzo Librandi, Jun 04 2011
(PARI) a(n)=16^(2*n+1) \\ Charles R Greathouse IV, Jul 11 2016

Crossrefs

Sequence in context: A297387 A016936 A321242 * A337025 A053859 A053863

Adjacent sequences: A013718 A013719 A013720 * A013722 A013723 A013724

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved