G.f.: 1 = Sum_{n>=0} a(n)*x^n / Product_{k=1..n+1} (1+k*x)^2.
A118804
G.f.: 1 = Sum_{n>=0} a(n)*x^n / Product_{k=1..n+1} (1+k*x)^2.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =66a(4) =685a(5) =9294a(6) =156697a(7) =3169910a(8) =74998081a(9) =2035262154a(10) =62391632417
External references
- oeis: A118804