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A058718
Number of nonisomorphic loopless matroids on n unlabeled points.
3
1, 1, 2, 4, 9, 21, 60, 208, 1418, 381448
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..9.
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), 415431.
Gordon Royle and Dillon Mayhew,
9element matroids
.
Index entries for sequences related to matroids
CROSSREFS
Row sums of
A058716
.
Sequence in context:
A048194
A148075
A351364
*
A148076
A217976
A156801
Adjacent sequences:
A058715
A058716
A058717
*
A058719
A058720
A058721
KEYWORD
nonn
,
nice
,
more
AUTHOR
N. J. A. Sloane
, Dec 31 2000
EXTENSIONS
a(9) from
Gordon Royle
, Dec 23 2006
STATUS
approved
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Last modified April 22 08:09 EDT 2024. Contains 371893 sequences. (Running on oeis4.)