Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation.
A147028
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =177a(9) =345a(10) =2505a(11) =5729a(12) =75825a(13) =187849a(14) =6215801a(15) =19558129a(16) =3054260057a(17) =12287993577
External references
- oeis: A147028