Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.
A147327
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =6a(9) =1a(10) =28a(11) =9a(12) =150a(13) =25a(14) =1118a(15) =57a(16) =7823a(17) =349a(18) =97756a(19) =3222a(20) =1845246a(21) =35623a(22) =42655192a(23) =520596a(24) =1288627017a(25) =9629183
External references
- oeis: A147327