506772domain: NAppears in sequencesNumber of (2+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.at n=15A252307Number of magic labelings of the prism graph I X C_8 having magic sum n.at n=6A289992