Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 6.

A252119

Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 6.

Terms

    a(0) =1091710a(1) =83930022a(2) =6987308056a(3) =542424609174

External references