Number of nX4 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors.
A199226
Number of nX4 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors.
Terms
- a(0) =6a(1) =148a(2) =1114a(3) =55956a(4) =1167274a(5) =9196334a(6) =530601540a(7) =11633434848a(8) =92326218546
External references
- oeis: A199226