Number of nX7 binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally.
A181223
Number of nX7 binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally.
Terms
- a(0) =81a(1) =6561a(2) =179097a(3) =7426986a(4) =316896477a(5) =12297765846a(6) =493466099722
External references
- oeis: A181223