Number of (n+2)X(4+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 or 5.
A251988
Number of (n+2)X(4+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 or 5.
Terms
- a(0) =1182549a(1) =43957515a(2) =2351304453a(3) =143941074215
External references
- oeis: A251988