215922769920domain: NAppears in sequences8-idempotent numbers: a(n) = binomial(n+8,8)*8^n.at n=8A141054a(n) = binomial(2*n, n) * n^n.at n=8A367271a(n) = binomial(n, k) * (n - k)^k where k = floor(n/2).at n=16A367274