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A096873
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Minimum diameter of an integral set of n points in the plane, no 3 on a line, no 4 on a circle.
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2
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OFFSET
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1,4
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COMMENTS
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An integral set is a set where all distances between points are integers.
As of 2011, it is not known if this sequence is finite or even if a(8) exists.
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REFERENCES
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H. Harborth, Integral distances in point sets, Butzer, P. L. (ed.) et al., Karl der Grosse und sein Nachwirken. 1200 Jahre Kultur und Wissenschaft in Europa. Band 2: Mathematisches Wissen. Turnhout: Brepols. 213-224 (1998).
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LINKS
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CROSSREFS
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KEYWORD
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hard,nonn,more
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AUTHOR
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EXTENSIONS
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a(7) computed in [Kreisel-Kurz].
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STATUS
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approved
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