Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation.
A147337
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =9a(7) =21a(8) =61a(9) =255a(10) =1001a(11) =4645a(12) =25381a(13) =168687a(14) =1415389
External references
- oeis: A147337