798454799domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of (n+2) X 3 0..1 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..1 introduced in row major order.at n=12A204860Prime numbersat n=41071162