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%I #11 Sep 03 2023 10:29:07
%S 1,3,9,25,70,217,950,8762,288454
%N Number of nonisomorphic loopless matroids of rank 3 on n labeled points.
%D A. Evnin, An Elementary Introduction to Matroids, Mathematical Education, 2(33), 2005, 2-33.
%H W. M. B. Dukes, <a href="http://www.stp.dias.ie/~dukes/matroid.html">Tables of matroids</a>
%H W. M. B. Dukes, <a href="http://www.stp.dias.ie/~dukes/phd.html">Counting and Probability in Matroid Theory</a>, Ph.D. Thesis, Trinity College, Dublin, 2000.
%H A. Evnin, <a href="http://www.mathnet.ru/eng/mo412">An elementary Introduction to Matroids</a>, Mathematical Education 2 (33) (2005), 2-33
%H <a href="/index/Mat#matroid">Index entries for sequences related to matroids</a>
%Y A diagonal of A058716.
%K nonn
%O 3,2
%A _N. J. A. Sloane_, Dec 31 2000
%E a(9)-a(11) _Alexander Evnin_, Dec 26 2008
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