Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-1100 pattern in any orientation.
A147476
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-1100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =23a(7) =11a(8) =466a(9) =277a(10) =14218a(11) =3983a(12) =707294a(13) =112981a(14) =56470385a(15) =8891967
External references
- oeis: A147476