1/729 the number of (n+2)X(n+2) 0..2 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace.

A185882

1/729 the number of (n+2)X(n+2) 0..2 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace.

Terms

    a(0) =27a(1) =28086a(2) =151319356

External references