A070397 a(n) = 6^n mod 25.

1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16, 21, 1, 6, 11, 16

Offset

0,2

Links

G. C. Greubel, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,1).

Formula

a(n) = a(n-5). - R. J. Mathar, Apr 20 2010

G.f.: ( -1-6*x-11*x^2-16*x^3-21*x^4 ) / ((x-1)*(1+x+x^2+x^3+x^4)). - R. J. Mathar, Apr 20 2010

Mathematica

PowerMod[6, Range[0, 80], 25] (* Harvey P. Dale, Jul 22 2013 *)

Prog

(Sage) [power_mod(6, n, 25)for n in range(0, 79)] # Zerinvary Lajos, Nov 27 2009
(PARI) a(n) = lift(Mod(6, 25)^n); \\ Altug Alkan, Mar 18 2016

Crossrefs

Sequence in context: A315454 A315455 A315456 * A080904 A081746 A080900

Adjacent sequences: A070394 A070395 A070396 * A070398 A070399 A070400

Keyword

nonn,easy

Author

N. J. A. Sloane, May 12 2002

Status

approved