Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.
A147469
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =5a(9) =5a(10) =17a(11) =17a(12) =39a(13) =39a(14) =155a(15) =155a(16) =1391a(17) =1391a(18) =19355a(19) =19355a(20) =265987a(21) =265987a(22) =4290113a(23) =4290113a(24) =107056079a(25) =107056079
External references
- oeis: A147469