Expansion of g.f. A(x) satisfying A(x) = Sum_{n>=0} x^(n+1) * Product_{k=0..n} (x^k + A(x)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =6a(4) =14a(5) =37a(6) =95a(7) =253a(8) =692a(9) =1918a(10) =5389a(11) =15316a(12) =43940a(13) =127105a(14) =370290a(15) =1085460a(16) =3199412a(17) =9476409a(18) =28191145a(19) =84195358a(20) =252352517a(21) =758806718a(22) =2288425896a(23) =6920189847a(24) =20978805020a(25) =63744392583a(26) =194101043120a(27) =592205499720