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A207418 Number of nX7 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 1 1 and 1 0 1 vertically 1
31, 961, 4719, 24317, 175903, 891720, 4094666, 21072638, 99746042, 440141222, 2003254604, 8937597494, 38381074339, 165425593855, 709144263593, 2981321572403, 12486729646315, 52162085656079, 215733902493821 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A207419

LINKS

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

EXAMPLE

Some solutions for n=4

..1..1..1..0..0..0..0....1..1..1..1..1..0..0....0..1..1..1..0..0..0

..0..1..1..1..0..0..0....1..1..1..0..0..0..0....1..1..1..0..1..1..0

..0..0..0..0..0..0..0....0..1..1..0..0..0..0....0..0..0..0..0..0..0

..1..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0

CROSSREFS

Sequence in context: A207734 A208693 A207563 * A223393 A207390 A207518

Adjacent sequences:  A207415 A207416 A207417 * A207419 A207420 A207421

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 17 2012

STATUS

approved

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Last modified May 11 13:41 EDT 2021. Contains 343791 sequences. (Running on oeis4.)