Number of (n+2)X3 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically, exactly one way.

A204410

Number of (n+2)X3 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically, exactly one way.

Terms

    a(0) =3570a(1) =34274a(2) =423416a(3) =2827014a(4) =22956524a(5) =254913953a(6) =2004465237a(7) =15823989959a(8) =158617650347

External references