109351

Appears in sequences

• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in an em 1,1 1,2 2,2 2,3 3,3 in any orientation.at n=9A146147
• Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in an em 1,1 1,2 2,2 2,3 3,3 in any orientation.at n=20A146149
• Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in an em 1,1 1,2 2,2 2,3 3,3 in any orientation.at n=21A146149