G.f.: A(x) = Sum_{n>=0} x^n * A(x)^(n^2) * (1 - A(x)^(2*n+1))/(1 - A(x)).

A199544

G.f.: A(x) = Sum_{n>=0} x^n * A(x)^(n^2) * (1 - A(x)^(2*n+1))/(1 - A(x)).

Terms

    a(0) =1a(1) =3a(2) =23a(3) =271a(4) =3876a(5) =61809a(6) =1057324a(7) =18999550a(8) =354126904a(9) =6790260312a(10) =133193201306

External references