A013812 a(n) = 20^(4*n+1).

20, 3200000, 512000000000, 81920000000000000, 13107200000000000000000, 2097152000000000000000000000, 335544320000000000000000000000000, 53687091200000000000000000000000000000, 8589934592000000000000000000000000000000000

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 (160000).

Formula

a(n) = 160000*a(n-1). - Harvey P. Dale, Dec 30 2012

Maple

A013812:=n->20^(4*n+1): seq(A013812(n), n=0..10); # Wesley Ivan Hurt, Mar 31 2017

Mathematica

20^(4*Range[0, 10]+1) (* or *) NestList[160000#&, 20, 10] (* Harvey P. Dale, Dec 30 2012 *)

Prog

(Magma) [20^(4*n+1): n in [0..15]]; // Vincenzo Librandi, Jul 06 2011

Crossrefs

Sequence in context: A056104 A051117 A180725 * A013894 A128671 A172766

Adjacent sequences: A013809 A013810 A013811 * A013813 A013814 A013815

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved