Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
A252218
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =14627a(1) =47580a(2) =420596a(3) =3410786a(4) =27565870a(5) =225314934a(6) =1834743852a(7) =14935638689a(8) =121853394501a(9) =993165752194
External references
- oeis: A252218