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%I #9 Dec 30 2019 15:05:51
%S 1,5,6,10,17
%N Covering numbers C(n,7,4) (next term is <= 24).
%D CRC Handbook of Combinatorial Designs, 1996, p. 263.
%H D. Gordon, <a href="http://www.dmgordon.org/cover">La Jolla Repository of Coverings</a>
%H <a href="/index/Cor#covnum">Index entries for covering numbers</a>
%K nonn,hard
%O 7,2
%A _N. J. A. Sloane_.
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