1/4 the number of (n+1)X6 0..3 arrays with every 2X2 subblock having one or four distinct clockwise edge differences.

A209855

1/4 the number of (n+1)X6 0..3 arrays with every 2X2 subblock having one or four distinct clockwise edge differences.

Terms

    a(0) =68201a(1) =10137464a(2) =1460712837a(3) =213959648565

External references