2922457domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000101.at n=6A259948Number of (n+2) X (7+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000101.at n=3A259951Prime numbersat n=211622