5147608domain: NAppears in sequencesNumber of n X n 1..n arrays with row and column sums n(n+1)/2 and no two adjacent elements equal.at n=4A176391Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime.at n=14A251944