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 exactly one way.

A204600

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 exactly one way.

Terms

    a(0) =3562a(1) =29678a(2) =328845a(3) =2275645a(4) =16247580a(5) =153711850a(6) =1240455298a(7) =9111381604a(8) =76764201360a(9) =642774112145

External references