Number of n X n binary arrays symmetric about main diagonal with all ones connected only either two adjacent vertically or two adjacent horizontally.
A145776
Number of n X n binary arrays symmetric about main diagonal with all ones connected only either two adjacent vertically or two adjacent horizontally.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =30a(5) =185a(6) =1496a(7) =16722a(8) =271203a(9) =6203100a(10) =197367854a(11) =8915141875a(12) =569403889486
External references
- oeis: A145776