Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0011 pattern in any orientation.
A147462
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =9a(9) =9a(10) =25a(11) =25a(12) =93a(13) =93a(14) =589a(15) =589a(16) =6735a(17) =6735a(18) =107293a(19) =107293a(20) =1848191a(21) =1848191a(22) =45715541a(23) =45715541a(24) =1702371353a(25) =1702371353
External references
- oeis: A147462