Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation.
A147106
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =7a(6) =15a(7) =37a(8) =181a(9) =733a(10) =3563a(11) =18321a(12) =120179a(13) =876663a(14) =8507491a(15) =85942209a(16) =1181855975
External references
- oeis: A147106