A204599 Number of (n+2)X(n+2) 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

3562, 144168, 981914, 10978524, 207096000, 1719348416, 20253298532, 382905131328, 3179075221184, 37448348985668, 707991587825472, 5878110083969216, 69241997274500132, 1309076445889297728

Offset

1,1

Comments

Diagonal of A204607

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A107646 A204607 A204600 * A206090 A357590 A071144

Adjacent sequences: A204596 A204597 A204598 * A204600 A204601 A204602

Keyword

nonn

Author

R. H. Hardin Jan 17 2012

Status

approved