Number of (n+1)X(n+1) 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

A203926

Number of (n+1)X(n+1) 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =396a(1) =106596a(2) =140120856

External references