E.g.f. A(x) = Sum_{n>=0} exp(3^n*x)*x^n/n!.

A135079

E.g.f. A(x) = Sum_{n>=0} exp(3^n*x)*x^n/n!.

Terms

    a(0) =1a(1) =2a(2) =8a(3) =56a(4) =704a(5) =15392a(6) =593408a(7) =39691136a(8) =4650143744a(9) =944100803072

External references