308993

Appears in sequences

• Number of n X n binary arrays symmetric about main diagonal with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation.at n=9A145946
• Number of n X n binary arrays symmetric about the diagonal and under 90-degree rotation with all ones connected in a 3 X 2 elbow 1,1 1,2 1,3 2,3 in any orientation.at n=20A145948
• Number of n X n binary arrays symmetric about the diagonal and under 90-degree rotation with all ones connected in a 3 X 2 elbow 1,1 1,2 1,3 2,3 in any orientation.at n=21A145948