a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n+k,k) * (-n)^(n-k).
A335310
a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n+k,k) * (-n)^(n-k).
Terms
- a(0) =1a(1) =1a(2) =-2a(3) =11a(4) =-74a(5) =477a(6) =-804a(7) =-84425a(8) =3315334a(9) =-102211207a(10) =3005297956a(11) =-88338323709
External references
- oeis: A335310