login
Graham-Sloane-type lower bound on the size of a ternary (n,3,6) constant-weight code.
0

%I #9 Apr 02 2020 19:37:53

%S 5,30,106,283,640,1286,2366,4068,6628,10333,15531,22631,32111,44525,

%T 60504,80766,106117,137460,175799,222244,278014,344448,423007,515276,

%U 622978,747968,892251,1057976,1247448,1463131,1707654

%N Graham-Sloane-type lower bound on the size of a ternary (n,3,6) 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=6.

%K nonn

%O 6,1

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