Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1101-0111-0100 pattern in any orientation.
A146856
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1101-0111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =17a(7) =27a(8) =587a(9) =1133a(10) =10901a(11) =28287a(12) =585741a(13) =1701229a(14) =131274347a(15) =487724577a(16) =70353958073a(17) =323657950757
External references
- oeis: A146856