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%I #5 Apr 10 2013 13:46:16
%S 1,2,4,8,20,52,146,430,1306,4176,13832,47452,169044,619672,234225
%N Number of open Skolem sequences of order n.
%H S. Burrill and L. Yen, <a href="http://arxiv.org/abs/1301.6424">Constructing Skolem sequences via generating trees</a>, arXiv preprint arXiv:1301.6424, 2013
%Y Cf. A004075.
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, Feb 18 2013
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