Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0111-1100-0111 pattern in any orientation.

A147375

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0111-1100-0111 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =21a(7) =61a(8) =266a(9) =891a(10) =3074a(11) =18035a(12) =122510a(13) =915879a(14) =8736750a(15) =97430523a(16) =1219777035a(17) =17287269221

External references