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A058719 Number of nonisomorphic loopless matroids of rank 3 on n labeled points. 2
1, 3, 9, 25, 70, 217, 950, 8762, 288454 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

REFERENCES

A. Evnin, An Elementary Introduction to Matroids, Mathematical Education, 2(33), 2005, 2-33.

LINKS

Table of n, a(n) for n=3..11.

W. M. B. Dukes, Tables of matroids

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

Index entries for sequences related to matroids

A. Evnin, An Elementary Introduction to Matroids.

CROSSREFS

A diagonal of A058716.

Sequence in context: A097861 A211284 A211283 * A046661 A309105 A101197

Adjacent sequences:  A058716 A058717 A058718 * A058720 A058721 A058722

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 31 2000

EXTENSIONS

a(9)-a(11) Alexander Evnin, Dec 26 2008

STATUS

approved

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Last modified February 22 11:21 EST 2020. Contains 332135 sequences. (Running on oeis4.)