Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1101-0111-0001 pattern in any orientation.
A147232
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1101-0111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =19a(7) =27a(8) =629a(9) =1269a(10) =16061a(11) =41045a(12) =855623a(13) =2568747a(14) =170862305a(15) =635460019a(16) =86331152665a(17) =400700298989
External references
- oeis: A147232