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

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =13a(5) =76a(6) =421a(7) =3361a(8) =26209a(9) =267688a(10) =2689201a(11) =33579811a(12) =412800961a(13) =6103089994a(14) =88754687113