Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1100-0110-0011 pattern in any orientation.
A147140
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1100-0110-0011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =87a(9) =159a(10) =1731a(11) =3703a(12) =46857a(13) =115477a(14) =2401469a(15) =6836409a(16) =422076549a(17) =1471030175a(18) =219087502441a(19) =947868551011
External references
- oeis: A147140