Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 4 or more.
A251855
Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 4 or more.
Terms
- a(0) =23664a(1) =459952a(2) =10413561a(3) =216245728a(4) =4504504613a(5) =95484824630
External references
- oeis: A251855