Number of (n+1)X(4+1) 0..2 arrays with each 2X2 subblock having the number of clockwise edge increases less than or equal to the number of counterclockwise edge increases.

A234828

Number of (n+1)X(4+1) 0..2 arrays with each 2X2 subblock having the number of clockwise edge increases less than or equal to the number of counterclockwise edge increases.

Terms

    a(0) =28602a(1) =2826144a(2) =263929692a(3) =24157113543

External references