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A307891
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Rectilinear crossing number A014540(n) - crossing number A000241(n) of complete graph on n nodes.
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0
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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
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OFFSET
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1,10
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LINKS
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EXAMPLE
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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.
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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