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Number of matroids: column 4 of A034328.
0

%I #7 Mar 30 2012 16:47:28

%S 0,0,0,1,4,11,26,58,121,240,454,835

%N Number of matroids: column 4 of A034328.

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

%H <a href="/index/Mat#matroid">Index entries for sequences related to matroids</a>

%H H. Fripertinger, <a href="http://www.mathe2.uni-bayreuth.de/frib/codes/tables.html">Isometry Classes of Codes</a>

%Y Cf. A034327-.

%K nonn

%O 0,5

%A _N. J. A. Sloane_.