%I #13 Dec 30 2019 15:05:19
%S 5,7,12,20,32
%N Covering numbers C(n,6,4) (next term is <= 41).
%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,more,hard
%O 6,1
%A _N. J. A. Sloane_.