G.f.: Sum_{n>=0} (2*n+1)! * x^n / Product_{k=1..2*n+1} (1 + k*x).
A208886
G.f.: Sum_{n>=0} (2*n+1)! * x^n / Product_{k=1..2*n+1} (1 + k*x).
Terms
- a(0) =1a(1) =5a(2) =85a(3) =3389a(4) =238021a(5) =25791485a(6) =3982831525a(7) =830287473629
External references
- oeis: A208886