A058719 Number of nonisomorphic loopless matroids of rank 3 on n labeled points.

1, 3, 9, 25, 70, 217, 950, 8762, 288454

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