Number of nX7 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1.

A204083

Number of nX7 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1.

Terms

    a(0) =0a(1) =1296a(2) =321696a(3) =76212900a(4) =35085052464

External references