Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation.
A147171
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =193a(9) =369a(10) =2595a(11) =6071a(12) =68113a(13) =166829a(14) =3392025a(15) =10054713a(16) =1656174053a(17) =6422563367
External references
- oeis: A147171