a(n) = (1/n) * Sum_{k = 0..2*n} (-1)^k * (n+2*k) * binomial(n+k-1,k)^3.
A361886
a(n) = (1/n) * Sum_{k = 0..2*n} (-1)^k * (n+2*k) * binomial(n+k-1,k)^3.
Terms
- a(0) =3a(1) =435a(2) =79464a(3) =16551315a(4) =3732732003a(5) =887492378136
External references
- oeis: A361886