A013736 a(n) = 5^(3*n + 1).

5, 625, 78125, 9765625, 1220703125, 152587890625, 19073486328125, 2384185791015625, 298023223876953125, 37252902984619140625, 4656612873077392578125, 582076609134674072265625, 72759576141834259033203125

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

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 (125).

Crossrefs

Cf. A013737.

Programs

Magma

[5^(3*n+1): n in [0..20]]; // Vincenzo Librandi, May 25 2011

Maple

seq(5^(3*n+1),n=0..12); # Nathaniel Johnston, Jun 26 2011

Mathematica

5^(3Range[0,15]+1) (* or *) NestList[125 #&,5,15] (* Harvey P. Dale, Jun 25 2011 *)

PARI

a(n)=5^(3*n+1) \\ Charles R Greathouse IV, Jul 11 2016

Formula

From Philippe Deléham, Nov 25 2008: (Start)

a(n) = 125*a(n-1); a(0)=5.

G.f.: 5/(1-125*x). (End)