Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-0111-0010 pattern in any orientation.

A147242

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-0111-0010 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =9a(6) =27a(7) =87a(8) =355a(9) =2031a(10) =15277a(11) =134979a(12) =1439889a(13) =18930955a(14) =307011633a(15) =6239442943a(16) =159275538371

External references