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A246988
Number of isomorphism classes of oriented matroids of dimension n and cardinality n+3.
1
1, 4, 12, 25, 50, 91, 164
OFFSET
1,2
CROSSREFS
A diagonal of A063804.
Sequence in context: A008264 A000297 A078618 * A304843 A062883 A364373
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Sep 17 2014
EXTENSIONS
a(4) corrected by Andrey Zabolotskiy, Mar 26 2023
STATUS
approved