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A207874 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 1 1 vertically 0
2, 16, 72, 400, 1648, 10742, 51696, 380632, 2048344, 17181610, 99927528, 1001175276, 6019939360, 76617072388, 455429901920, 7551993118538, 45011858516784, 1023575674079354, 6041127787154280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207879

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A209538 A006729 A007758 * A208374 A207677 A207508

Adjacent sequences:  A207871 A207872 A207873 * A207875 A207876 A207877

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 21 2012

STATUS

approved

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Last modified June 26 04:11 EDT 2019. Contains 324369 sequences. (Running on oeis4.)