4108471domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of nX7 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically.at n=3A206870Number of 4Xn 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically.at n=6A206873Prime numbersat n=290328