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%I #7 Nov 08 2013 23:36:29
%S 3,2,3,4,5,9,12,17,25,33
%N Number of distinct regular languages over unary alphabet, whose minimum regular expression has ordinary length n.
%H Hermann Gruber, Jonathan Lee, and Jeffrey Shallit, <a href="http://arxiv.org/abs/1204.4982">Enumerating regular expressions and their languages</a>, arXiv:1204.4982v1 [cs.FL]
%K nonn,hard
%O 1,1
%A _Hermann Gruber_, Apr 26 2012
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