a(n) = (1/n) * Sum_{k = 0..n} (n+2*k) * binomial(n+k-1,k)^3.
A361883
a(n) = (1/n) * Sum_{k = 0..n} (n+2*k) * binomial(n+k-1,k)^3.
Terms
- a(0) =4a(1) =98a(2) =3550a(3) =150722a(4) =6993504a(5) =343542572a(6) =17560824138a(7) =924397069250
External references
- oeis: A361883