G.f.: A(x) = exp( Sum_{n>=1} (1 + C(2n-1,n-1)*x)^n * x^n/n ).
A159320
G.f.: A(x) = exp( Sum_{n>=1} (1 + C(2n-1,n-1)*x)^n * x^n/n ).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =20a(5) =158a(6) =2474a(7) =77743a(8) =4991796a(9) =594667388a(10) =146257399827
External references
- oeis: A159320