G.f. satisfies: A(x*A(-x)) = C(x), where C(x) = 1 + x*C(x)^2 is the Catalan function of A000108.
A244278
G.f. satisfies: A(x*A(-x)) = C(x), where C(x) = 1 + x*C(x)^2 is the Catalan function of A000108.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =25a(5) =87a(6) =323a(7) =1213a(8) =4616a(9) =18122a(10) =73034a(11) =296118a(12) =1201985a(13) =4944712a(14) =20699593a(15) =87039567a(16) =364582540a(17) =1536503788a(18) =6577636822a(19) =28301509234a(20) =120717294622a(21) =515067346615
External references
- oeis: A244278