Number of nX4 binary arrays with every one adjacent to another one horizontally or vertically.

A202798

Number of nX4 binary arrays with every one adjacent to another one horizontally or vertically.

Terms

    a(0) =7a(1) =126a(2) =1718a(3) =22946a(4) =311144a(5) =4217066a(6) =57127796a(7) =773948962a(8) =10485233258a(9) =142050385280

External references