Number of n X n binary arrays symmetric about main diagonal with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation.
A145946
Number of n X n binary arrays symmetric about main diagonal with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =13a(5) =41a(6) =227a(7) =1869a(8) =21295a(9) =308993a(10) =6084845a(11) =167200773a(12) =6380227531a(13) =331792369009
External references
- oeis: A145946