A207207 Number of nX7 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal

1440, 2073600, 1037800112, 532255213048, 269004461507864, 139281562211310598, 72904426459924759331

Offset

1,1

Comments

Column 7 of A207208

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=4
..1..1..0..2..1..1..0....1..1..1..1..1..0..2....1..0..0..0..2..2..0
..1..1..0..1..0..0..2....2..2..0..2..2..1..2....1..1..0..2..0..2..0
..0..1..0..0..2..2..2....1..1..1..1..0..2..1....1..2..0..2..0..2..2
..1..1..0..2..2..2..0....0..2..2..1..2..1..2....0..2..2..0..0..2..0

Crossrefs

Sequence in context: A289633 A282330 A207213 * A206733 A207357 A207200

Adjacent sequences: A207204 A207205 A207206 * A207208 A207209 A207210

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved