Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 11000-01110-00011 pattern in any orientation.
A147192
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 11000-01110-00011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =9a(6) =25a(7) =39a(8) =213a(9) =729a(10) =5371a(11) =22321a(12) =227621a(13) =1304481a(14) =19507517a(15) =156958957
External references
- oeis: A147192