id:A030506 - OEIS Search Results

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Graham-Sloane-type lower bound on the size of a ternary (n,3,6) constant-weight code.

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5, 30, 106, 283, 640, 1286, 2366, 4068, 6628, 10333, 15531, 22631, 32111, 44525, 60504, 80766, 106117, 137460, 175799, 222244, 278014, 344448, 423007, 515276, 622978, 747968, 892251, 1057976, 1247448, 1463131, 1707654 (list; graph; listen)

	OFFSET	`6,1`
	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: A164015 A128302 A071252 this_sequence A062990 A018213 A047661` `Adjacent sequences: A030503 A030504 A030505 this_sequence A030507 A030508 A030509`
	KEYWORD	`nonn`
	AUTHOR	`Mattias Svanstrom (mattias(AT)isy.liu.se)`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

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