Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 3 6 or 8.
A252624
Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 3 6 or 8.
Terms
- a(0) =17704a(1) =78710a(2) =585774a(3) =5013608a(4) =45094726a(5) =410194726a(6) =3747351702a(7) =34254637480a(8) =313184238226
External references
- oeis: A252624