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A194617
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Half the number of lower triangles of a 4X4 0..n array with no element equal to the average of its horizontal and vertical neighbors
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1
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47, 4322, 132214, 1674043, 12561823, 66369488, 279618492, 975189851, 2972844263, 8086809479, 20111108169, 46277171169, 100029289052, 204344500677, 398372414831, 744412292078, 1341415693780, 2338177034539, 3960008651919
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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=2
..1........1........0........1........1........1........2........0
..0.1......0.2......2.2......2.0......2.2......2.2......0.2......2.0
..0.1.0....1.2.0....0.0.2....1.2.1....1.1.0....0.0.1....1.1.0....0.1.1
..0.2.2.0..2.0.0.1..1.0.0.2..0.0.2.1..1.2.0.2..1.0.0.1..1.0.0.1..2.0.2.1
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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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