1/20 of the number of (n+1) X 9 0..4 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease.

A183718

1/20 of the number of (n+1) X 9 0..4 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease.

Terms

    a(0) =985a(1) =18566a(2) =303170a(3) =5374440a(4) =94463507a(5) =1680902120a(6) =29887741084a(7) =532844962952

External references