Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-0111-0001 pattern in any orientation.
A147234
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-0111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =7a(6) =19a(7) =49a(8) =195a(9) =1111a(10) =7177a(11) =51609a(12) =452845a(13) =5123643a(14) =72369101a(15) =1214915609a(16) =24818665423a(17) =626087799933
External references
- oeis: A147234