G.f. A(x) satisfies: A( x - x*A(2*x)/2 ) = x.

A195195

G.f. A(x) satisfies: A( x - x*A(2*x)/2 ) = x.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =31a(4) =412a(5) =9322a(6) =370792a(7) =26998435a(8) =3721060012a(9) =992975985526

External references