A058718 Number of nonisomorphic loopless matroids on n unlabeled points.
1, 1, 2, 4, 9, 21, 60, 208, 1418, 381448
Offset: 0
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.
- 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.
- Dillon Mayhew and Gordon F. Royle, Matroids with nine elements, arXiv:math/0702316 [math.CO], 2007.
- Dillon Mayhew and Gordon F. Royle, Matroids with nine elements, J. Combin. Theory Ser. B 98(2) (2008), 415-431.
- Gordon Royle and Dillon Mayhew, 9-element matroids.
- Index entries for sequences related to matroids
Crossrefs
Row sums of A058716.
Extensions
a(9) from Gordon Royle, Dec 23 2006