Number of nX7 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.
A199255
Number of nX7 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.
Terms
- a(0) =41a(1) =14160a(2) =2913528a(3) =267827143a(4) =340245592285
External references
- oeis: A199255