Number of (n+1)X3 0..3 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

A203820

Number of (n+1)X3 0..3 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =1296a(1) =27216a(2) =571536a(3) =12002256a(4) =252047376a(5) =5292994896a(6) =111152892816

External references