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
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 12 2002
STATUS
approved