0,3

Row sums of number triangle A115636. Partial sums of A115638.

R. Stephan, Divide-and-conquer generating functions. I. Elementary sequences

G.f.: (1/(1-x))*sum{k>=0, 4^k*x^(2^(k+1)-2)/(1+x^(2^k))}; The g.f. G(x) satisfies G(x)-4(1+x)*x^2*G(x^2)=1/(1-x^2);

Adjacent sequences: A115634 A115635 A115636 this_sequence A115638 A115639 A115640

Sequence in context: A128355 A129522 A133842 this_sequence A124602 A132707 A046575

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Jan 27 2006