G.f. satisfies: A(x/A(x)) = 1 + x*A(x).

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =34a(5) =203a(6) =1398a(7) =10706a(8) =89120a(9) =794347a(10) =7502170a(11) =74511150a(12) =773864654a(13) =8368430208a(14) =93905460014