Number of (n+1)X4 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.
A186556
Number of (n+1)X4 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.
Terms
- a(0) =60074a(1) =13360840a(2) =2976803436a(3) =663296784123
External references
- oeis: A186556