E.g.f.: A(x) = f(x*A(x)^2), where f(x) = exp(arctan(x)).

A088691

E.g.f.: A(x) = f(x*A(x)^2), where f(x) = exp(arctan(x)).

Terms

    a(0) =1a(1) =1a(2) =5a(3) =47a(4) =657a(5) =12245a(6) =285805a(7) =8022555a(8) =263276705a(9) =9892965545a(10) =418911700725

External references