a(n) = binomial(2n,n)^3.A002897a(n) = binomial(2n,n)^3.Terms a(0) =1a(1) =8a(2) =216a(3) =8000a(4) =343000a(5) =16003008a(6) =788889024a(7) =40424237568External referencesoeis: A002897