0,3

G.f.: 1/(1-x-2x^2-4x^3-6x^4-8x^5-8x^6-6x^7-3x^8-x^9); a(n)=a(n-1)+2a(n-2)+4a(n-3)+6a(n-4)+8a(n-5)+8a(n-6)+6a(n-7)+3a(n-8)+a(n-9).

Sequence in context: A000242 A077846 A005322 this_sequence A098182 A007046 A097861

Adjacent sequences: A103777 A103778 A103779 this_sequence A103781 A103782 A103783

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Feb 15 2005