Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A058717
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A058717 Triangle T(n,k) giving number of nonisomorphic loopless matroids of rank k on n labeled points (n >= 1, 1<=k<=n). +0
2
1, 1, 1, 1, 2, 1, 1, 4, 3, 1, 1, 6, 9, 4, 1, 1, 10, 25, 18, 5, 1, 1, 14, 70, 85, 31, 6, 1, 1, 21, 217, 832, 288, 51, 7, 1 (list; table; graph; listen)
OFFSET

1,5

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.

Index entries for sequences related to matroids

W. M. B. Dukes, On the number of matroids on a finite set

EXAMPLE

1; 0,1; 0,1,1; 0,1,2,1; 0,1,4,3,1; ...

CROSSREFS

Cf. A058716 (same except for border), A058710, A058711. Row sums give A058718. Diagonals give A000065, A058719.

Adjacent sequences: A058714 A058715 A058716 this_sequence A058718 A058719 A058720

Sequence in context: A110470 A055080 A034367 this_sequence A034371 A101321 A091186

KEYWORD

nonn,tabl,nice

AUTHOR

njas, Dec 31 2000

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.


AT&T Labs Research