144348067domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 1 3 6 or 7.at n=24A252150Prime numbersat n=8143991