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A058716
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Triangle T(n,k) giving number of nonisomorphic loopless matroids of rank k on n labeled points (n >= 0, 0 <= k <= n).
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5
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1, 0, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 4, 3, 1, 0, 1, 6, 9, 4, 1, 0, 1, 10, 25, 18, 5, 1, 0, 1, 14, 70, 85, 31, 6, 1, 0, 1, 21, 217, 832, 288, 51, 7, 1
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OFFSET
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0,9
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LINKS
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EXAMPLE
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Triangle T(n,k) (with rows n >= 0 and columns k >= 0) begins as follows:
1;
0, 1;
0, 1, 1;
0, 1, 2, 1;
0, 1, 4, 3, 1;
0, 1, 6, 9, 4, 1;
0, 1, 10, 25, 18, 5, 1;
0, 1, 14, 70, 85, 31, 6, 1;
0, 1, 21, 217, 832, 288, 51, 7, 1;
...
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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