820631045

Appears in sequences

• Number of n X n binary arrays with all ones connected only in a 1101-1111 pattern in any orientation.at n=9A146863
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-1111 pattern in any orientation.at n=20A146865
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-1111 pattern in any orientation.at n=21A146865