G.f. A(x) satisfies A(x) = C(x) / (1 - x*A(x)^2), where C(x) is the g.f. of A000108.

A381826

G.f. A(x) satisfies A(x) = C(x) / (1 - x*A(x)^2), where C(x) is the g.f. of A000108.

Terms

    a(0) =1a(1) =2a(2) =8a(3) =41a(4) =241a(5) =1545a(6) =10503a(7) =74429a(8) =543833a(9) =4067510a(10) =30985633a(11) =239560975a(12) =1874831287a(13) =14823253892a(14) =118222204539a(15) =949963236834

External references