A293956 Maximum over all sets of n points in the plane of the number of second-smallest distances between the points.

0, 0, 2, 4, 6, 9, 11, 14, 18, 20

Offset

1,3

Links

Table of n, a(n) for n=1..10.

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

Cf. A047932, A186705.

Sequence in context: A288468 A271906 A050502 * A022760 A347778 A164286

Adjacent sequences: A293953 A293954 A293955 * A293957 A293958 A293959

Keyword

nonn,more

Author

N. J. A. Sloane, Nov 01 2017

Status

approved