Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01100-00110-00011 pattern in any orientation.
A147446
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01100-00110-00011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =9a(11) =9a(12) =33a(13) =33a(14) =169a(15) =169a(16) =1097a(17) =1097a(18) =10553a(19) =10553a(20) =189871a(21) =189871a(22) =4385605a(23) =4385605a(24) =121876221
External references
- oeis: A147446