A204407 Number of (n+2)X9 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally, vertically or nw-to-se diagonally

8916413698, 70339685822, 390091281543, 3295136296152, 24512116048486, 293407168633797, 2207029201023771, 21911437072459629, 430514154992807997, 3260720153263079196, 28863006384281816178, 493937895603239521650

Offset

1,1

Comments

Column 7 of A204408

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=3
..0..1..0..2..2..0..1..1..1....2..1..2..2..0..2..1..0..0
..2..1..1..0..2..1..0..1..2....1..0..1..2..1..0..1..1..0
..2..2..2..1..0..2..1..0..2....0..1..2..0..2..1..0..2..1
..0..1..2..2..1..2..2..1..0....0..0..0..1..2..2..1..2..2
..2..0..1..2..2..2..2..2..1....2..1..0..2..0..1..2..0..1

Crossrefs

Sequence in context: A154876 A270612 A331412 * A144651 A345863 A346257

Adjacent sequences: A204404 A204405 A204406 * A204408 A204409 A204410

Keyword

nonn

Author

R. H. Hardin Jan 15 2012

Status

approved