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A220284
Equals one maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and vertical neighbors in a random 0..1 nX3 array
1
4, 31, 139, 1411, 9430, 63154, 452515, 3130768, 21630714, 150540232, 1043064746, 7226190511, 50094800811, 347052655839, 2404198149909, 16655726484462, 115373519626103, 799165840938429, 5535587924914620, 38342402997836989
OFFSET
1,1
COMMENTS
Column 3 of A220287
LINKS
EXAMPLE
Some solutions for n=3
..0..0..1....1..0..1....1..1..0....0..0..0....1..0..1....1..0..0....0..1..0
..0..0..1....1..0..1....1..0..1....0..0..0....0..0..0....0..0..1....0..0..0
..1..1..0....0..1..0....1..0..0....0..1..0....0..0..0....0..0..1....0..0..0
CROSSREFS
Sequence in context: A263760 A297501 A296734 * A059938 A263761 A263762
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 09 2012
STATUS
approved