Number of (n+1) X 4 0..5 arrays with every 2 X 2 subblock having equal diagonal elements or equal antidiagonal elements.

A203929

Number of (n+1) X 4 0..5 arrays with every 2 X 2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =47916a(1) =2543436a(2) =140120856a(3) =7748585676a(4) =428652828396

External references