4764760domain: NAppears in sequencesa(n) = n*(n+1)*(2*n+1)*(3*n+1)*(4*n+1)/6.at n=16A011197a(n) = 14*(n+1)*binomial(n+4,8).at n=9A027804a(n) = 55*(n+1)*binomial(n+4,12).at n=5A027808