Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.
A147468
Number of n X n binary arrays symmetric under horizontal 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) =57a(9) =101a(10) =607a(11) =1089a(12) =8859a(13) =19351a(14) =240245a(15) =590155a(16) =24829301a(17) =73370321a(18) =4764846299a(19) =16592732065
External references
- oeis: A147468