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A007233
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Number of free subsets of multiplicative group of GF(7^n).
(Formerly M3127)
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1
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3, 31, 171, 1575, 8403, 77206, 411771, 3828187, 20176803, 185374380, 988663371, 9083344725, 48444505203, 445083891551, 2373780754971, 22068742956375
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OFFSET
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1,1
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COMMENTS
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Observe that a(2*n+1) = (7^(2*n+1) - 1)/2 for n = 0,1,2,...,7. Does this result hold for general n? - Peter Bala, Mar 22 2018
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REFERENCES
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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.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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