Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 3X3 el 1,1 1,2 1,3 2,3 3,3 in any orientation.
A146033
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 3X3 el 1,1 1,2 1,3 2,3 3,3 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =15a(5) =39a(6) =189a(7) =995a(8) =5569a(9) =37913a(10) =366061a(11) =4244909a(12) =58320195a(13) =974389263a(14) =20855855835a(15) =546928072163
External references
- oeis: A146033