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A058687 Number of matroids of rank 3 on n labeled points. 1
1, 15, 171, 2053, 33442, 1022217 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..8.

W. M. B. Dukes, Tables of matroids.

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

W. M. B. Dukes, The number of matroids on a finite set, arXiv:math/0411557 [math.CO], 2004.

W. M. B. Dukes, On the number of matroids on a finite set, Séminaire Lotharingien de Combinatoire 51 (2004), Article B51g.

Index entries for sequences related to matroids

CROSSREFS

Column k=3 of A058669.

Sequence in context: A206600 A016172 A016225 * A206594 A152586 A339547

Adjacent sequences:  A058684 A058685 A058686 * A058688 A058689 A058690

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 30 2000

STATUS

approved

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Last modified November 27 20:49 EST 2021. Contains 349395 sequences. (Running on oeis4.)