Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 4 5 or 6.
A251831
Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 4 5 or 6.
Terms
- a(0) =3354a(1) =27554a(2) =262404a(3) =2298772a(4) =20314774a(5) =182241310a(6) =1624862992a(7) =14480032642a(8) =129225388882
External references
- oeis: A251831