A131608 - OEIS

A131608

Period 24: repeat 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, -1, -1, -3, -7, -7, -1, -9, -9, -7, -3, -3, -9.

1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, -1, -1, -3, -7, -7, -1, -9, -9, -7, -3, -3, -9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, -1, -1, -3, -7, -7, -1, -9, -9, -7, -3, -3, -9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, -1, -1, -3, -7, -7, -1, -9, -9, -7, -3, -3, -9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, -1, -1, -3, -7, -7, -1, -9, -9, -7, -3, -3, -9

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Table of n, a(n) for n=0..95.

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

FORMULA

a(n)= -a(n-12).

G.f. (1+x)*(1+x+x^2)*(x^2-x+1)*(9*x^6-6*x^5+4*x^3+2*x^2+1) / ( (1+x^4)*(x^8-x^4+1) ). - R. J. Mathar, Oct 08 2011

MATHEMATICA

PadRight[{}, 100, {1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, -1, -1, -3, -7, -7, -1, -9, -9, -7, -3, -3, -9}] (* Harvey P. Dale, Jun 09 2015 *)

CROSSREFS