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

A210073

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

Terms

    a(0) =27129a(1) =4437262a(2) =707627792a(3) =114628150378

External references