Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A058669
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A058669 Triangle T(n,k) read by rows, giving number of matroids of rank k on n labeled points (n >= 0, 0<=k<=n). +0
5
1, 1, 1, 1, 3, 1, 1, 7, 7, 1, 1, 15, 36, 15, 1, 1, 31, 171, 171, 31, 1, 1, 63, 813, 2053, 813, 63, 1, 1, 127, 4012, 33442, 33442, 4012, 127, 1, 1, 255, 20891, 1022217, 8520812, 1022217, 20891, 255, 1, 1, 511 (list; table; graph; listen)
OFFSET

0,5

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; 1,1; 1,3,1; 1,7,7,1; ...

CROSSREFS

Row sums give A058673. Diagonals give A058681, A058687. Cf. A053534.

Sequence in context: A046802 A022166 A141689 this_sequence A057004 A059328 A075440

Adjacent sequences: A058666 A058667 A058668 this_sequence A058670 A058671 A058672

KEYWORD

nonn,nice,tabl,more

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Dec 30 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 December 15 00:47 EST 2009. Contains 170825 sequences.


AT&T Labs Research