Number of (n+1)X2 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

A203880

Number of (n+1)X2 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =637a(1) =8281a(2) =107653a(3) =1399489a(4) =18193357a(5) =236513641a(6) =3074677333a(7) =39970805329a(8) =519620469277

External references