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A063853
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Triangle T(n,k) (n >= 3, k = 1..n-2) giving number of abstract order types of configurations of n points in n-k dimensions.
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4
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1, 1, 3, 1, 5, 11, 1, 8, 55, 93, 1, 11, 204, 5083, 2121, 1, 15, 705, 505336, 10775236, 122508, 1, 19, 2293
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 3,3
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LINKS
| L. Finschi, Homepage of Oriented Matroids
L. Finschi and K. Fukuda, Complete combinatorial generation of small point set configurations and hyperplane arrangements, pp. 97-100 in Abstracts 13-th Canadian Conference on Computational Geometry (CCCG '01), Waterloo, Aug. 13-15, 2001.
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EXAMPLE
| 1; 1,3; 1,5,11; 1,8,55,93; ...
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CROSSREFS
| Diagonals give A063854, A063855, A063856. Row sums give A063857.
Sequence in context: A177463 A065229 A093905 * A105064 A073496 A176122
Adjacent sequences: A063850 A063851 A063852 * A063854 A063855 A063856
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KEYWORD
| nonn,tabl,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Aug 26 2001
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