2072728127

Appears in sequences

• Number of n X n binary arrays with all ones connected only in a 2X2 elbow 1,1 1,2 2,1 in any orientation.at n=7A145935
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X2 elbow 1,1 1,2 2,1 in any orientation.at n=16A145937
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X2 elbow 1,1 1,2 2,1 in any orientation.at n=17A145937