Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1110-0111 pattern in any orientation.

A146818

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1110-0111 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =9a(6) =23a(7) =59a(8) =317a(9) =2143a(10) =14651a(11) =111875a(12) =1267355a(13) =18704275a(14) =315484781a(15) =6350976523a(16) =167797579971

External references