8963823755

Appears in sequences

• Number of n X n binary arrays with all ones connected only in a 2X2 block with tail 1,1 1,2 1,3 2,2 2,3 in any orientation.at n=8A146046
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X2 block with tail 1,1 1,2 1,3 2,2 2,3 in any orientation.at n=18A146048
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X2 block with tail 1,1 1,2 1,3 2,2 2,3 in any orientation.at n=19A146048