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%I #21 Jun 29 2015 06:51:52
%S 1,3,1,5,3,1,9,3,3,1,27,8,3,3,1
%N Triangle T(n,k), 1 <= k <= n, giving maximal size of ternary code of length n and covering radius k.
%C Next term, T(6,1), is in range 71-73. - _Kamiel P.F. Verstraten_, Jun 29 2015
%D G. D. Cohen et al., Covering Codes, North-Holland, 1997, p. 174.
%H W. Haas, <a href="http://dx.doi.org/10.1016/S0012-365X(00)00461-1">Binary and ternary codes of covering radius one: some new lower bounds</a>, Discrete Math., 245 (2002), 161-178.
%H <a href="/index/Coa#covcod">Index entries for sequences related to covering codes</a>
%e Triangle starts:
%e 1;
%e 3,1;
%e 5,3,1;
%e 9,3,3,1;
%e ...
%Y First column gives A004044. Cf. A060438, A060440.
%K nonn,tabl,nice,more
%O 1,2
%A _N. J. A. Sloane_, Apr 07 2001
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