G.f. A(x) satisfies A(x) = C(x*A(x)^2) / (1 - x*A(x)), where C(x) is the g.f. of A000108.
A381830
G.f. A(x) satisfies A(x) = C(x*A(x)^2) / (1 - x*A(x)), where C(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =69a(4) =558a(5) =4946a(6) =46506a(7) =455587a(8) =4599494a(9) =47517909a(10) =499933964a(11) =5337957532a(12) =57694565830a(13) =630010984557
External references
- oeis: A381830