Number of nX4 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1.
A204080
Number of nX4 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1.
Terms
- a(0) =0a(1) =16a(2) =256a(3) =11236a(4) =107584a(5) =3904576a(6) =76212900a(7) =1650959424a(8) =39031534096a(9) =864587548224
External references
- oeis: A204080