id:A058211 - OEIS Search Results

Search: id:A058211

Displaying 1-1 of 1 results found.

page 1

Numbers n such that there is an arrangement of n points in the plane such that no point is on >= n/2 connecting lines.

+0
1

9, 15, 19, 25, 31, 37 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Counterexamples to a conjecture of Dirac.`
	REFERENCES	`H. T. Croft, K. J. Falconer and R. K. Guy, Unsolved Problems in Geometry, F12.`
	CROSSREFS	`Sequence in context: A093642 A118236 A070876 this_sequence A038599 A079364 A039769` `Adjacent sequences: A058208 A058209 A058210 this_sequence A058212 A058213 A058214`
	KEYWORD	`nonn,nice,hard`
	AUTHOR	`njas, Nov 30 2000`

page 1

Search completed in 0.002 seconds

Last modified July 4 18:25 EDT 2008. Contains 140886 sequences.