Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111-0001 pattern in any orientation.
A147282
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =9a(6) =29a(7) =121a(8) =541a(9) =3221a(10) =21119a(11) =159497a(12) =1485397a(13) =18836335a(14) =303422599a(15) =5770504647
External references
- oeis: A147282