login
Graham-Sloane-type lower bound on the size of a ternary (n,3,5) constant-weight code.
0

%I #9 Apr 02 2020 19:37:42

%S 3,15,45,106,213,384,643,1014,1526,2210,3100,4236,5658,7411,9541,

%T 12101,15144,18727,22910,27758,33337,39717,46971,55175,64410,74758,

%U 86304,99139,113355,129047,146314,165257,185983,208600,233219

%N Graham-Sloane-type lower bound on the size of a ternary (n,3,5) constant-weight code.

%H M. Svanstrom, <a href="http://www.dtr.isy.liu.se/dtr/staff/mattias">A lower bound for ternary constant weight codes</a>, IEEE Trans. on Information Theory, Vol. 43, pp. 1630-1632, Sep. 1997.

%F a(n) = ceiling(binomial(n, w) * 2^w / (2*n + 1)) with w=5.

%K nonn

%O 5,1

%A Mattias Svanstrom (mattias(AT)isy.liu.se)