Number of nX6 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
A203844
Number of nX6 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =810a(2) =362648a(3) =83049596a(4) =19914461784
External references
- oeis: A203844