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

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

Offset: 3

Author

N. J. A. Sloane, Dec 31 2000

Keywords

• nonn

References

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

Links

• 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.

Extensions

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