Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.
A147400
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =7a(7) =15a(8) =29a(9) =107a(10) =505a(11) =2403a(12) =11235a(13) =68883a(14) =550857a(15) =5140463a(16) =52360741a(17) =625116575a(18) =9135765233a(19) =158905603757
External references
- oeis: A147400