Number of nX7 0..3 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.
A201624
Number of nX7 0..3 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.
Terms
- a(0) =40a(1) =6654a(2) =1877283a(3) =891142897a(4) =464328365996
External references
- oeis: A201624