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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 0
1440, 2073600, 1037800112, 532255213048, 269004461507864, 139281562211310598, 72904426459924759331 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 21 08:31 EDT 2022. Contains 353898 sequences. (Running on oeis4.)