Number of nX7 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.
A201538
Number of nX7 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.
Terms
- a(0) =18a(1) =899a(2) =72811a(3) =9526987a(4) =1408677515a(5) =208164634003
External references
- oeis: A201538