Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01000-11111-00010 pattern in any orientation.
A147013
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01000-11111-00010 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) =13a(11) =13a(12) =57a(13) =57a(14) =273a(15) =273a(16) =2363a(17) =2363a(18) =27689a(19) =27689a(20) =439785a(21) =439785a(22) =10940975a(23) =10940975a(24) =360992565a(25) =360992565
External references
- oeis: A147013