Number of nX4 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1.
A203538
Number of nX4 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1.
Terms
- a(0) =0a(1) =16a(2) =144a(3) =3364a(4) =30976a(5) =614656a(6) =8479744a(7) =129504400a(8) =1978826256a(9) =29961532836a(10) =454089995044
External references
- oeis: A203538