A034327 - OEIS

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A034327

Triangle of numbers of connected regular (k X n)-matrix matroids of dimension k.

9

1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 3, 5, 3, 1, 1, 4, 9, 9, 4, 1, 1, 5, 17, 24, 17, 5, 1, 1, 7, 29, 60, 60, 29, 7, 1, 1, 8, 47, 133, 192, 133, 47, 8, 1, 1, 10, 72, 279, 556, 556, 279, 72, 10, 1, 1, 12, 110, 556, 1514, 2108, 1514, 556, 110, 12, 1

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,9

REFERENCES

Computed by Harald Fripertinger (fripert(AT)kfunigraz.ac.at).

LINKS

Table of n, a(n) for n=0..66.

H. Fripertinger, Isometry Classes of Codes

H. Fripertinger, Regular matroids

Index entries for sequences related to binary linear codes

Index entries for sequences related to matroids

EXAMPLE

The triangle begins:

1;

1;

1, 1;

1, 1, 1;

1, 2, 2, 1;

...

CROSSREFS

Columns: A034329, A034330, A034331, A034332.

Sequence in context: A144444 A054106 A132044 * A034254 A157103 A135966

Adjacent sequences: A034324 A034325 A034326 * A034328 A034329 A034330

KEYWORD

nonn,tabf

AUTHOR

N. J. A. Sloane

STATUS

approved