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A030508 Graham-Sloane-type lower bound on the size of a ternary (n,3,8) constant-weight code. 0
16, 122, 549, 1837, 5069, 12203, 26510, 53141, 99840, 177811, 302759, 496128, 786545, 1211476, 1819136, 2670647, 3842461, 5429083, 7546084, 10333440, 13959209, 18623545, 24563096, 32055772, 41425920, 53049910, 67362149 (list; graph; refs; listen; history; text; internal format)
OFFSET

8,1

LINKS

Table of n, a(n) for n=8..34.

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)).

CROSSREFS

Sequence in context: A068880 A053883 A191484 * A006215 A227088 A060633

Adjacent sequences:  A030505 A030506 A030507 * A030509 A030510 A030511

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified October 14 12:25 EDT 2019. Contains 328006 sequences. (Running on oeis4.)