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%I M3835 #12 Jan 30 2015 21:56:45
%S 1,5,13,52,121,455,1093,4305,9841,36905,88573,348728,797161,2989355,
%T 7174453,28585712,64570081,242137805,581130733,2288202262
%N Number of free subsets of multiplicative group of GF(3^n).
%D P. Bouchard and Y.-N. Yeh, Finding f-free subsets of maximal cardinality, Séries Formelles et Combinatoire Algébrique, 4th colloquium, 15-19 Juin 1992, Montréal, Université du Québec à Montréal, pp. 11-17.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%K nonn
%O 1,2
%A _Simon Plouffe_
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