Number of different fixed (possibly) disconnected n-ominoes bounded (not necessarily tightly) by an n*n square.

A162676

Number of different fixed (possibly) disconnected n-ominoes bounded (not necessarily tightly) by an n*n square.

Terms

    a(0) =1a(1) =4a(2) =48a(3) =956a(4) =26490a(5) =937342a(6) =40291608a(7) =2036155284a(8) =118202408622

External references