%I #7 Mar 26 2023 15:55:40
%S 1,4,12,25,50,91,164
%N Number of isomorphism classes of oriented matroids of dimension n and cardinality n+3.
%H Lukas Finschi, <a href="https://finschi.com/math/om/">Homepage of Oriented Matroids</a>
%Y A diagonal of A063804.
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, Sep 17 2014
%E a(4) corrected by _Andrey Zabolotskiy_, Mar 26 2023
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