52053

Appears in sequences

• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1110-0111 pattern in any orientation.at n=11A146816
• Number of nX3 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=11A302304