OFFSET
2,5
COMMENTS
It appears that a(4*n+1) = 1. - Michel Marcus, Mar 23 2016
FORMULA
Empirical g.f.: x^5*(1+3*x-6*x^4+6*x^5+x^8-x^9) / ((1-x)*(1+x^2)*(1+2*x^2-x^4)*(1-2*x^2-x^4)). - Colin Barker, Mar 22 2016
EXAMPLE
PROG
(PARI) a000129(n) = ([2, 1; 1, 0]^n)[2, 1];
for(n=2, 1e2, print1(sum(k=1, n, a000129(k)) % a000129(n\2), ", "));
CROSSREFS
KEYWORD
nonn
AUTHOR
Altug Alkan, Mar 22 2016
STATUS
approved