A011979 - OEIS

%I #13 Feb 02 2020 21:33:55

%S 1,4,6,12,14,25,30,47,57,78,91,124,140,183,207

%N Covering numbers C(n,4,3) (next term is <= 261).

%D CRC Handbook of Combinatorial Designs, 1996, p. 262.

%H D. Gordon, <a href="http://www.dmgordon.org/cover">La Jolla Repository of Coverings</a>

%H K. J. Nurmela and Patric R. J. Östergård, <a href="http://www.tcs.hut.fi/old/papers/tp1.ps.Z">New coverings of t-sets with (t+1)-sets</a>, J. Combinat. Designs, 7 (1999), 217-226.

%H K. J. Nurmela and Patric R. J. Östergård, <a href="http://www.tcs.hut.fi/old/papers/table3.html">New coverings of t-sets with (t+1)-sets (appendix)</a>, J. Combinat. Designs, 7 (1999), 217-226.

%H <a href="/index/Cor#covnum">Index entries for covering numbers</a>

%Y A column of A066010.

%K nonn,hard

%O 4,2

%A _N. J. A. Sloane_