Number of nX7 0..3 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.
A209091
Number of nX7 0..3 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.
Terms
- a(0) =12793a(1) =163660849
External references
- oeis: A209091