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A183818 1/81 the number of (n+1)X8 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor 0
262144, 536415300, 1050517114472, 2096961683069192, 4156740912572653752 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A183819

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions with upper left block zero for 3X8

..0..0..0..2..0..2..0..2....0..0..0..1..0..1..0..1....0..0..0..1..0..0..0..2

..0..0..1..1..0..2..1..0....0..0..1..1..0..2..1..0....0..0..1..2..0..2..1..0

..2..1..0..1..0..1..0..1....1..1..0..0..0..0..0..0....1..1..1..2..0..1..0..1

CROSSREFS

Sequence in context: A010806 A030637 A236226 * A016965 A017037 A017121

Adjacent sequences:  A183815 A183816 A183817 * A183819 A183820 A183821

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 07 2011

STATUS

approved

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Last modified July 15 20:00 EDT 2019. Contains 325056 sequences. (Running on oeis4.)