2153667

Appears in sequences

• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1111-0100 pattern in any orientation.at n=13A146376
• Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-1111-0100 pattern in any orientation.at n=29A146378