id:A030504 - OEIS Search Results

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Graham-Sloane-type lower bound on the size of a ternary (n,3,4) constant-weight code.

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2, 8, 19, 38, 66, 107, 160, 230, 317, 424, 553, 705, 883, 1088, 1324, 1591, 1891, 2227, 2601, 3015, 3470, 3969, 4514, 5106, 5748, 6441, 7189, 7992, 8852, 9772, 10754, 11800, 12911, 14090, 15339, 16659, 18053, 19522, 21070, 22697 (list; graph; listen)

	OFFSET	`4,1`
	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: A049525 A109071 A031327 this_sequence A000158 A101427 A126877` `Adjacent sequences: A030501 A030502 A030503 this_sequence A030505 A030506 A030507`
	KEYWORD	`nonn`
	AUTHOR	`Mattias Svanstrom (mattias(AT)isy.liu.se)`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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