a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n^2+k+1,n)/(n^2+k+1).
A336537
a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n^2+k+1,n)/(n^2+k+1).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =134a(4) =3298a(5) =122762a(6) =6208970a(7) =399606286a(8) =31331798914
External references
- oeis: A336537