G.f. satisfies: A(x) = Sum_{n>=0} x^n * A(x)^(n^2).

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =31a(5) =158a(6) =884a(7) =5292a(8) =33385a(9) =219797a(10) =1500449a(11) =10573815a(12) =76688602a(13) =571232869a(14) =4363912280a(15) =34161879247a(16) =273906591562