1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences.

A209708

1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences.

Terms

    a(0) =24a(1) =2710a(2) =1277340a(3) =2744311427

External references