Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1110-0111-0100 pattern in any orientation.
A146731
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1110-0111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =17a(7) =31a(8) =603a(9) =1111a(10) =11835a(11) =31735a(12) =783013a(13) =2381907a(14) =261886119a(15) =1041960181a(16) =168146324241a(17) =823285902521
External references
- oeis: A146731