247860domain: NAppears in sequencesa(n) = 3^4 * binomial(n+3, 4).at n=14A102741Number of nX7 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=5A207751Number of 6Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=6A207755