Number of nX3 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1.

A204079

Number of nX3 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) =256a(4) =5260a(5) =37636a(6) =321696a(7) =2951524a(8) =26486820a(9) =229461904a(10) =2051332140a(11) =18106931844a(12) =160285145184

External references