Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111-0100 pattern in any orientation.
A147157
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =11a(7) =27a(8) =63a(9) =325a(10) =2169a(11) =14949a(12) =107269
External references
- oeis: A147157