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

A209713

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

Terms

    a(0) =63280a(1) =9278940a(2) =1293734407a(3) =183988612894

External references