id:A030505 - OEIS Search Results

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

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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; listen)

	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) = ceil (binomial (n, w) * 2^w / (2*n + 1))`
	CROSSREFS	`Sequence in context: A094191 A050534 A048099 this_sequence A074355 A005560 A100747` `Adjacent sequences: A030502 A030503 A030504 this_sequence A030506 A030507 A030508`
	KEYWORD	`nonn`
	AUTHOR	`Mattias Svanstrom (mattias(AT)isy.liu.se)`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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