Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1110-0111 pattern in any orientation.
A146816
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1110-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =19a(7) =31a(8) =717a(9) =1507a(10) =20113a(11) =52053a(12) =1344751a(13) =4220463a(14) =406071927a(15) =1625689575a(16) =292516297827
External references
- oeis: A146816