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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; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..9.

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 A217976 A156801

Adjacent sequences:  A058715 A058716 A058717 * A058719 A058720 A058721

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane, Dec 31 2000

EXTENSIONS

a(9) from Gordon Royle, Dec 23 2006

STATUS

approved

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Last modified April 24 16:06 EDT 2019. Contains 322430 sequences. (Running on oeis4.)