50196domain: NAppears in sequencesNumber of (n+2)X(4+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.at n=7A231223Expansion of Sum_{k>=1} (-1 + Product_{j>=1} (1 + x^(k*j))^j).at n=21A302550