Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 3 or 6 and every diagonal and antidiagonal sum 3 or 6.
A251828
Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 3 or 6 and every diagonal and antidiagonal sum 3 or 6.
Terms
- a(0) =413202a(1) =3073138a(2) =38456182a(3) =266585018a(4) =4235688278a(5) =56477451898a(6) =395032012018
External references
- oeis: A251828