76488984domain: NAppears in sequencesa(n) = (24*n)!*(4*n)!*n!/((12*n)!*(8*n)!*(7*n)!*(2*n)!).at n=1A295479a(n) = Product_{k = ceiling(n/2)..n-1} A090252(k).at n=13A354758a(n) = (12*n)!*(2*n)!*(n/2)!/((6*n)!*(4*n)!*(7*n/2)!*n!).at n=2A364183