11202105600domain: NAppears in sequences(n!*(3*n))^2.at n=7A069134a(n) = [n/2]!*[(n+1)/2]!*C([n/2],2)*C([(n+1)/2],2).at n=13A226283[n/2]!*[(n+1)/2]!*C([n/2],5)*C([(n+1)/2],5).at n=13A226286