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A207857 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 0 1 vertically 1
40, 1600, 13230, 178088, 2047902, 24999522, 298294290, 3584335104, 42968437070, 515629329072, 6185911022388, 74218338931926, 890410143869610, 10682416271430446, 128158495357747566, 1537548202464027744 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A207858

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207702 A207907 A208038 * A207425 A207740 A208082

Adjacent sequences:  A207854 A207855 A207856 * A207858 A207859 A207860

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 21 2012

STATUS

approved

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Last modified August 1 17:43 EDT 2021. Contains 346402 sequences. (Running on oeis4.)