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Search: id:A111024
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| A111024 |
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Triangle read by rows: T(n,s), 0<=s<n, = 1 if there exist in the Euclidean plane n lines with exactly s points of intersection of these lines on each line, otherwise 0. |
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| 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1
(list; table; graph; listen)
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OFFSET
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1,1
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REFERENCES
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B. Gruenbaum, 'Points on lines' revisited, Nieuw Tijdschr. Wisk., 68 (1980-81), 209-213.
F. Heierman, Punten op lijnen, Nieuw Tijdschr. Wisk., 67 (1979-80) 113-120.
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EXAMPLE
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1; 1,1; 1,1,1; 1,1,1,1; 1,1,1,1,1; 1,1,0,1,1,1
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CROSSREFS
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Sequence in context: A014791 A014332 A014655 this_sequence A015586 A015700 A015852
Adjacent sequences: A111021 A111022 A111023 this_sequence A111025 A111026 A111027
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KEYWORD
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nonn,tabl
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AUTHOR
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Floor van Lamoen (fvlamoen(AT)hotmail.com), Oct 05 2005
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