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A058718 Number of nonisomorphic loopless matroids on n unlabeled points. 3
1, 1, 2, 4, 9, 21, 60, 208, 1418, 381448 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

LINKS

W. M. B. Dukes, Tables of matroids

W. M. B. Dukes, Counting and Probability in Matroid Theory, Ph.D. Thesis, Trinity College, Dublin, 2000.

Gordon Royle and Dillon Mayhew, 9-element matroids

Index entries for sequences related to matroids

CROSSREFS

Row sums of A058716.

Sequence in context: A123458 A048194 A148075 * A148076 A156801 A057580

Adjacent sequences:  A058715 A058716 A058717 * A058719 A058720 A058721

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Dec 31 2000

EXTENSIONS

a(9) from Gordon Royle, Dec 23 2006

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Last modified February 13 15:16 EST 2012. Contains 205519 sequences.