A003829 - OEIS

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A003829

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

%I #10 Dec 17 2015 17:30:20

%S 1,4,4,8,12,16

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

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

%K nonn,more

%O 3,2

%A _N. J. A. Sloane_

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