1413873475

Appears in sequences

• Number of n X n binary arrays with all ones connected only in an em 1,1 1,2 2,2 2,3 3,3 in any orientation.at n=9A146144
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in an em 1,1 1,2 2,2 2,3 3,3 in any orientation.at n=20A146146
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in an em 1,1 1,2 2,2 2,3 3,3 in any orientation.at n=21A146146