Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 111-110-111 pattern in any orientation.
A146282
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 111-110-111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =9a(7) =5a(8) =29a(9) =17a(10) =313a(11) =37a(12) =1657a(13) =109a(14) =19905a(15) =2661a(16) =319705a(17) =46501a(18) =11762329a(19) =480069a(20) =357135757a(21) =5729689a(22) =14191646903a(23) =346242155a(24) =884769592659a(25) =24356919567
External references
- oeis: A146282