0,4

G.f.: (1+x^2-5x^3+3x^4-3x^5-x^6-2x^7)/((1-4x^3)(1+x+x^2+x^3+x^4+x^5)); a(n)=-a(n-1)-a(n-2)+3a(n-3)+3a(n-4)+3a(n-5)+4a(n-6)+4a(n-7)+4a(n-8).

Sequence in context: A020774 A106688 A011169 this_sequence A120493 A085880 A055883

Adjacent sequences: A117900 A117901 A117902 this_sequence A117904 A117905 A117906

easy,sign

Paul Barry (pbarry(AT)wit.ie), Apr 01 2006