Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation.

A147264

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =15a(7) =33a(8) =77a(9) =553a(10) =3895a(11) =24243a(12) =170053a(13) =2059185a(14) =30409467a(15) =474043707a(16) =8705603341a(17) =222308455647

External references