G.f. A(x) satisfies A(x) = (1 + x * A(x)^3) / (1 - 2 * x).
A348793
G.f. A(x) satisfies A(x) = (1 + x * A(x)^3) / (1 - 2 * x).
Terms
- a(0) =1a(1) =3a(2) =15a(3) =102a(4) =807a(5) =6951a(6) =63240a(7) =597864a(8) =5815167a(9) =57815553a(10) =584919951a(11) =6002197914a(12) =62321630100a(13) =653553174756
External references
- oeis: A348793