Number of (n+2)X7 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally, vertically or nw-to-se diagonally.
A204405
Number of (n+2)X7 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally, vertically or nw-to-se diagonally.
Terms
- a(0) =70193731a(1) =518498299a(2) =3226550173a(3) =23029550325a(4) =218058070601
External references
- oeis: A204405