257342

Appears in sequences

• Number of n X n binary arrays with all ones connected only in a 1000-1111-1000 pattern in any orientation.at n=8A146413
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-1000 pattern in any orientation.at n=19A146415
• Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 3 6 or 7.at n=26A252257