Number of (n+2)X3 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally, vertically or nw-to-se diagonally.
A204401
Number of (n+2)X3 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) =4293a(1) =47883a(2) =719125a(3) =6579664a(4) =70193731a(5) =852798050a(6) =8916413698a(7) =96129489898
External references
- oeis: A204401