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

A203280

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

Terms

    a(0) =0a(1) =4a(2) =28a(3) =64a(4) =372a(5) =1444a(6) =6528a(7) =28900a(8) =127412a(9) =565504a(10) =2499460a(11) =11062276a(12) =48938240a(13) =216501796a(14) =957836180a(15) =4237489216a(16) =18747036420a(17) =82938240100a(18) =366925158784

External references