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A246988 Number of isomorphism classes of oriented matroids of dimension n and cardinality n+3. 1
1, 4, 12, 35, 50, 91, 164 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..7.

L. Finschi, Homepage of Oriented Matroids

CROSSREFS

A diagonal of A063804.

Sequence in context: A061703 A126948 A131593 * A084362 A318941 A079736

Adjacent sequences:  A246985 A246986 A246987 * A246989 A246990 A246991

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Sep 17 2014

STATUS

approved

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Last modified April 24 16:06 EDT 2019. Contains 322430 sequences. (Running on oeis4.)