G.f. satisfies A(x) = (1+x*A(x)^4)/(1-x)^2.

A364630

G.f. satisfies A(x) = (1+x*A(x)^4)/(1-x)^2.

Terms

    a(0) =1a(1) =3a(2) =17a(3) =153a(4) =1621a(5) =18732a(6) =229103a(7) =2915498a(8) =38204497a(9) =512027945a(10) =6985933889a(11) =96705749625

External references