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A269193
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Number of nX7 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once.
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1
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8748, 1008804, 194596516, 36068275268, 6648192704604, 1209655310225276, 217602949665911156, 38754403905072091620, 6843294057789444736828, 1199620248489898735000620, 208983050480777152531950868
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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=1
..3..1..2..3..3..2..3. .2..0..1..3..0..1..0. .1..0..2..0..1..3..0
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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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