0,3

a(2n+1)=A006516(n+1).

G.f.: x(1+2x-6x^2+8x^3+8x^4-32x^5)/((1-2x^2)(1-4x^2)(1-6x^2+8x^4)); a(n)=12a(n-2)-52a(n-4)+96a(n-6)-64a(n-8).

Sequence in context: A018225 A075845 A003087 this_sequence A108327 A121071 A092199

Adjacent sequences: A109240 A109241 A109242 this_sequence A109244 A109245 A109246

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Jun 23 2005