17813333domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=15A258999Prime numbersat n=1140140