E.g.f. satisfies A(x)^A(x) = 1/(1 - x)^exp(x).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =10a(5) =35a(6) =121a(7) =1092a(8) =5216a(9) =39321a(10) =558643a(11) =2433508a(12) =48144944a(13) =688652549a(14) =2176310995a(15) =145742587616