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A293956
Maximum over all sets of n points in the plane of the number of second-smallest distances between the points.
3
0, 0, 2, 4, 6, 9, 11, 14, 18, 20
OFFSET
1,3
LINKS
Peter Brass, The maximum number of second smallest distances in finite planar sets, Discrete & Computational Geometry 7.1 (1992): 371-379.
Peter Brass, Annotated version of Fig. 1 from Brass (1992), illustrating small values of a(n).
CROSSREFS
Sequence in context: A288468 A271906 A050502 * A022760 A347778 A164286
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Nov 01 2017
STATUS
approved