Number of n X n binary arrays with all ones connected only either two adjacent vertically or two adjacent horizontally.

A145773

Number of n X n binary arrays with all ones connected only either two adjacent vertically or two adjacent horizontally.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =25a(4) =314a(5) =7358a(6) =349511a(7) =32855368a(8) =6141909014

External references