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A058721 Number of simple matroids on n labeled points. 1
1, 2, 7, 49, 733, 29760, 9000402 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..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

Row sums of A058720.

Sequence in context: A293043 A186860 A139008 * A324513 A086902 A265042

Adjacent sequences:  A058718 A058719 A058720 * A058722 A058723 A058724

KEYWORD

nonn,nice,more,changed

AUTHOR

N. J. A. Sloane, Dec 31 2000

STATUS

approved

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Last modified October 17 16:51 EDT 2019. Contains 328120 sequences. (Running on oeis4.)