A307891 - OEIS

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A307891

Rectilinear crossing number A014540(n) - crossing number A000241(n) of complete graph on n nodes.

%I #12 Sep 29 2019 07:05:56

%S 0,0,0,0,0,0,0,1,0,2,2,3,4,9,6,15,14,21,22,37,30,53,52,69,74,102,96

%N Rectilinear crossing number A014540(n) - crossing number A000241(n) of complete graph on n nodes.

%e For 8 nodes the crossing number is 18 and the rectilinear crossing number is 19. The difference for 8 nodes is 1. Thus a(8)=1.

%Y Cf. A000241, A014540, A028723.

%K nonn,hard,more

%O 1,10

%A _Ed Pegg Jr_, May 03 2019