E.g.f. satisfies A(x) = exp(x + x^3/2 * A(x)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =25a(5) =121a(6) =751a(7) =7351a(8) =73417a(9) =749449a(10) =9477181a(11) =136883341a(12) =2041250641a(13) =33289802833a(14) =608025141907