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%I #5 Apr 24 2015 22:32:56
%S 0,0,0,1,1,2,4,4,5,7,10
%N Maximal number of joints that can be formed by n lines in space.
%C A joint is a point in space where three non-coplanar lines intersect.
%C It is not completely certain that a(9)=7 has been proved.
%H Joseph Zurier, <a href="http://math.mit.edu/research/highschool/primes/materials/2014/Zurier.pdf">Generalizations of the Joints Problem</a>, 2015.
%H Joseph Zurier, <a href="https://vimeo.com/125852921">The Joints Problem in Incidence Geometry (Video)</a>, Part 1, Experimental Math Seminar, Rutgers University, Apr 23 2015
%H Joseph Zurier, <a href="https://vimeo.com/125852922">The Joints Problem in Incidence Geometry (Video)</a>, Part 2, Experimental Math Seminar, Rutgers University, Apr 23 2015
%K nonn,more
%O 0,6
%A _N. J. A. Sloane_, Apr 24 2015