0,3

-a(n) is the Hankel transform of A000108(n)*(2^n+0^n)/2=A003645(n-1). The Hankel transform of A003645(n) is 4^C(n+1,2).

a(n)=4^C(n,2)*n*2^(n-1); a(n)=A053763(n)*A001787(n);

Sequence in context: A062206 A086701 A129008 this_sequence A042109 A145243 A006089

Adjacent sequences: A134180 A134181 A134182 this_sequence A134184 A134185 A134186

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Oct 11 2007