A013710 a(n) = 5^(2*n + 1).

5, 125, 3125, 78125, 1953125, 48828125, 1220703125, 30517578125, 762939453125, 19073486328125, 476837158203125, 11920928955078125, 298023223876953125, 7450580596923828125, 186264514923095703125

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 (25).

Formula

From Philippe Deléham, Nov 23 2008: (Start)

a(n) = 25*a(n-1); a(0)=5.

G.f.: 5/(1-25*x). (End)

E.g.f.: 5*exp(25*x). - Mohammad K. Azarian, Dec 23 2008

Mathematica

NestList[25#&, 5, 20] (* Harvey P. Dale, Aug 08 2013 *)

Prog

(Magma) [5^(2*n+1): n in [0..20]]; // Vincenzo Librandi, May 26 2011
(PARI) a(n)=5^(2*n+1) \\ Charles R Greathouse IV, Jul 11 2016

Crossrefs

Cf. A000351.

Sequence in context: A067081 A195801 A154022 * A202628 A358110 A109345

Adjacent sequences: A013707 A013708 A013709 * A013711 A013712 A013713

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved