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A030505 Graham-Sloane-type lower bound on the size of a ternary (n,3,5) constant-weight code. 0
3, 15, 45, 106, 213, 384, 643, 1014, 1526, 2210, 3100, 4236, 5658, 7411, 9541, 12101, 15144, 18727, 22910, 27758, 33337, 39717, 46971, 55175, 64410, 74758, 86304, 99139, 113355, 129047, 146314, 165257, 185983, 208600, 233219 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,1
LINKS
M. Svanstrom, A lower bound for ternary constant weight codes, IEEE Trans. on Information Theory, Vol. 43, pp. 1630-1632, Sep. 1997.
FORMULA
a(n) = ceiling(binomial(n, w) * 2^w / (2*n + 1)) with w=5.
CROSSREFS
Sequence in context: A094191 A050534 A048099 * A301632 A074355 A201868
KEYWORD
nonn
AUTHOR
Mattias Svanstrom (mattias(AT)isy.liu.se)
STATUS
approved

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Last modified April 13 15:24 EDT 2024. Contains 371644 sequences. (Running on oeis4.)