id:A030509 - OEIS Search Results

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Graham-Sloane-type lower bound on the size of a ternary (n,3,9) constant-weight code.

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27, 244, 1225, 4506, 13559, 35346, 82664, 177494, 355621, 672796, 1212758, 2097452, 3499818, 5659535, 8902155, 13662083, 20509867, 30184333, 43630080, 62040927, 86909874, 120086243, 163840610, 220938240, 294721720 (list; graph; listen)

	OFFSET	`9,1`
	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: A027500 A069979 A075548 this_sequence A042414 A099226 A016107` `Adjacent sequences: A030506 A030507 A030508 this_sequence A030510 A030511 A030512`
	KEYWORD	`nonn`
	AUTHOR	`Mattias Svanstrom (mattias(AT)isy.liu.se)`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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