A003829 Maximal number of unit circles through n points in plane, each circle containing 3 of the points.

1, 4, 4, 8, 12, 16

Offset

3,2

References

P. Erdős and G. Purdy, Extremal problems in combinatorial geometry, Chapter 17 in Handbook of Combinatorics, North-Holland '95, p. 848.

Links

Table of n, a(n) for n=3..8.

Crossrefs

Sequence in context: A292276 A278083 A086663 * A194697 A194696 A302681

Adjacent sequences: A003826 A003827 A003828 * A003830 A003831 A003832

Keyword

nonn,more

Author

N. J. A. Sloane

Extensions

The article by Erdős and Purdy incorrectly says (on p. 847) that each circle must contain a pair of the points.

Status

approved