Number of nX3 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
A203096
Number of nX3 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
Terms
- a(0) =16a(1) =1080a(2) =48552a(3) =2029744a(4) =87531478a(5) =3790420430a(6) =163621176194
External references
- oeis: A203096