A011994 - OEIS

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A011994

(n,3,4) difference families over Z_n.

2, 4, 0, 3, 21, 0, 180, 253, 0, 2981, 21742, 0, 320760 (list; graph; refs; listen; history; internal format)

	OFFSET	`6,1`
	REFERENCES	`CRC Handbook of Combinatorial Designs, 1996, p. 285.`
	CROSSREFS	`Sequence in context: A175630 A021420 A198543 * A054003 A134352 A152648` `Adjacent sequences: A011991 A011992 A011993 * A011995 A011996 A011997`
	KEYWORD	`nonn,hard`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 16:00 EST 2012. Contains 205938 sequences.