971381domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.at n=6A260919Number of (n+2) X (7+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.at n=6A260926Prime numbersat n=76458