A058719 - OEIS

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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.

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

Index entries for sequences related to matroids

CROSSREFS

A diagonal of A058716.

Sequence in context: A211284 A211283 A333608 * 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

NODES