0,2

G.f.: (1-x-3x^2-x^3)/(1-3x-6x^2+3x^3+x^4)=(1-x-3x^2-x^3)/((1+x-x^2)(1-4x-x^2)); a(n)=3a(n-1)+6a(n-2)-3a(n-3)-a(n-4); a(n)=(-1)^n*F(n-1)*3/5+F(3n+2)*2/5.

Cf. A056570.

Sequence in context: A150945 A150946 A150947 this_sequence A150948 A150949 A150950

Adjacent sequences: A110221 A110222 A110223 this_sequence A110225 A110226 A110227

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Jul 16 2005