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A204196
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Number of nX7 0..1 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..1 introduced in row major order
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1
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21, 882, 1724, 9940, 67169, 461894, 3162172, 21906411, 152100304, 1053377463, 7321279936, 50893161901, 353396805989, 2456759583794, 17078402117279, 118676436051497, 824965798194515, 5734649466128312, 39857755473341719
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=5
..0..0..1..0..0..1..1....0..0..1..1..0..1..1....0..0..1..1..0..0..1
..0..1..0..1..1..0..0....1..1..0..0..1..1..0....1..1..0..0..1..1..0
..1..0..1..1..0..0..1....1..0..1..1..0..0..1....0..0..1..1..0..0..1
..0..1..1..0..0..1..1....0..1..1..0..1..1..0....1..1..0..0..1..1..0
..1..0..0..1..1..0..0....1..0..0..1..0..0..1....0..0..1..1..0..0..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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