Number of (n+1)X(n+1) 0..2 arrays with every element both >= and <= some horizontal, vertical, diagonal or antidiagonal neighbor.

A232344

Number of (n+1)X(n+1) 0..2 arrays with every element both >= and <= some horizontal, vertical, diagonal or antidiagonal neighbor.

Terms

    a(0) =21a(1) =5309a(2) =6753291a(3) =78572361735

External references