Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111 pattern in any orientation.
A146396
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =21a(6) =85a(7) =433a(8) =2775a(9) =20277a(10) =189267a(11) =2151189a(12) =36658025a(13) =657296273a(14) =17789206817
External references
- oeis: A146396