A013783 a(n) = 5^(4*n + 3).

125, 78125, 48828125, 30517578125, 19073486328125, 11920928955078125, 7450580596923828125, 4656612873077392578125, 2910383045673370361328125, 1818989403545856475830078125, 1136868377216160297393798828125

Offset

0,1

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 (625).

Formula

From Philippe Deléham, Nov 30 2008: (Start)

a(n) = 625*a(n-1); a(0)=125.

G.f.: 125/(1-625*x).

a(n) = 25*A013782(n). (End)

Mathematica

5^(4*Range[0, 20]+3) (* or *) NestList[625#&, 125, 20] (* Harvey P. Dale, Aug 14 2018 *)

Prog

(Magma) [5^(4*n+3): n in [0..15]]; // Vincenzo Librandi, Jun 28 2011

Crossrefs

Subsequence of A000351.

Sequence in context: A163596 A194654 A222277 * A030697 A265623 A050640

Adjacent sequences: A013780 A013781 A013782 * A013784 A013785 A013786

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved