a(n) = Sum_{k=0..n} k*C(n,k)^2*C(n+k,k)^3, where C := binomial.
A112035
a(n) = Sum_{k=0..n} k*C(n,k)^2*C(n+k,k)^3, where C := binomial.
Terms
- a(0) =0a(1) =8a(2) =540a(3) =42576a(4) =3675000a(5) =334595040a(6) =31539372732
External references
- oeis: A112035