18920177

Appears in sequences

• Number of n X n binary arrays with all ones connected only in a 110-100-111 pattern in any orientation.at n=8A146171
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 110-100-111 pattern in any orientation.at n=18A146173
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 110-100-111 pattern in any orientation.at n=19A146173