Number of (n+2)X(7+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 or 4.
A251681
Number of (n+2)X(7+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 or 4.
Terms
- a(0) =29839a(1) =100307a(2) =632811a(3) =4748285a(4) =38111915a(5) =310560937a(6) =2525118941a(7) =20534822225a(8) =167304924269
External references
- oeis: A251681