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

A252442

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

Terms

    a(0) =1677a(1) =13777a(2) =131202a(3) =1149386a(4) =10157387a(5) =91120655a(6) =812431496a(7) =7240016321a(8) =64612694441a(9) =576415113903

External references