0,4

Hankel transform is A131713. Binomial transform is A166588.

G.f.: (1+3x-sqrt(1+2x-3x^2))/(2x); (1+3x)/(1+2x-x^2/(1+x-x^2/(1+x-x^2/(1+x-x^2/(1+... (continued fraction).

a(n)=0^n+sum{k=0..n, C(n-1,k-1)*(-3)^(n-k)*A000108(k)}.

Sequence in context: A094286 A094287 A094288 this_sequence A086246 A001006 A027057

Adjacent sequences: A166584 A166585 A166586 this_sequence A166588 A166589 A166590

easy,sign

Paul Barry (pbarry(AT)wit.ie), Oct 17 2009