Number of n X n 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1.

A204077

Number of n X n 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1.

Terms

    a(0) =0a(1) =4a(2) =132a(3) =11236a(4) =13346532a(5) =94591923364

External references