G.f.: exp( Sum_{n>=1} A000984(n)*A000172(n) * x^n/n ), which involves central binomial coefficients (A000984) and Franel numbers (A000172).
A199813
G.f.: exp( Sum_{n>=1} A000984(n)*A000172(n) * x^n/n ), which involves central binomial coefficients (A000984) and Franel numbers (A000172).
Terms
- a(0) =1a(1) =4a(2) =38a(3) =504a(4) =8249a(5) =154036a(6) =3149326a(7) =68741880a(8) =1576163328a(9) =37548785408a(10) =922252542128
External references
- oeis: A199813