Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1001-1111 pattern in any orientation.
A147406
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1001-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =1a(5) =9a(6) =9a(7) =43a(8) =127a(9) =501a(10) =1169a(11) =21077a(12) =14501a(13) =1245641a(14) =426195a(15) =52418221a(16) =46737495a(17) =4157184667a(18) =7896602235a(19) =878958425775
External references
- oeis: A147406