Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1111-0010 pattern in any orientation.
A147114
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =25a(7) =81a(8) =473a(9) =2129a(10) =11977a(11) =83125a(12) =759723a(13) =8281919a(14) =118112177a(15) =1957920765
External references
- oeis: A147114