Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0111-1100 pattern in any orientation.
A146675
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0111-1100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =23a(7) =13a(8) =524a(9) =295a(10) =16870a(11) =4271a(12) =898998a(13) =126315a(14) =77111883a(15) =11176639a(16) =18132712367a(17) =2597442391a(19) =846650197340
External references
- oeis: A146675