OFFSET
0,2
LINKS
Edward Jiang, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (1,-1,1,-1,1).
FORMULA
From R. J. Mathar, Apr 20 2010: (Start)
a(n) = a(n-1) - a(n-2) + a(n-3) - a(n-4) + a(n-5).
G.f.: ( -1-4*x-21*x^2+8*x^3-17*x^4 ) / ( (x-1)*(1+x+x^2)*(1-x+x^2) ). (End)
a(n) = a(n-6). - G. C. Greubel, Mar 13 2016
MATHEMATICA
PowerMod[5, Range[0, 50], 28] (* G. C. Greubel, Mar 13 2016 *)
PROG
(Sage) [power_mod(5, n, 28) for n in range(0, 83)] # Zerinvary Lajos, Nov 26 2009
(PARI) a(n)=lift(Mod(5, 28)^n) \\ Charles R Greathouse IV, Mar 22 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 12 2002
STATUS
approved