1/4 the number of (n+1)X5 0..3 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.

A210331

1/4 the number of (n+1)X5 0..3 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.

Terms

    a(0) =43519a(1) =10050240a(2) =2266459861a(3) =517186072378

External references