G.f. A(x) satisfies: 1 = Sum_{n>=0} ( 1 + x*A(x)^n - A(x) )^n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =6a(6) =22a(7) =92a(8) =419a(9) =2066a(10) =10863a(11) =60459a(12) =354381a(13) =2177439a(14) =13979759a(15) =93527819a(16) =650509643a(17) =4694372980a(18) =35086564926a(19) =271174745565