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A058722 Number of simple matroids of rank 4 on n labeled points. 1
1, 16, 337, 18700, 7642631 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

LINKS

Table of n, a(n) for n=4..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=4 of A058720.

Sequence in context: A240344 A068368 A013993 * A318013 A320399 A173906

Adjacent sequences:  A058719 A058720 A058721 * A058723 A058724 A058725

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Dec 31 2000

STATUS

approved

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Last modified February 17 00:25 EST 2020. Contains 331976 sequences. (Running on oeis4.)