A011990 - OEIS

A011990

Covering numbers C(n,9,5) (next term is <= 19).

1, 6, 7, 12 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`9,2`
	REFERENCES	`CRC Handbook of Combinatorial Designs, 1996, p. 263.`
	LINKS	`Table of n, a(n) for n=9..12.` `D. Gordon, La Jolla Repository of Coverings` `Index entries for covering numbers`
	CROSSREFS	`Sequence in context: A228948 A297128 A035110 * A105085 A287412 A097354` `Adjacent sequences: A011987 A011988 A011989 * A011991 A011992 A011993`
	KEYWORD	`nonn,hard`
	AUTHOR	`N. J. A. Sloane`
	STATUS	`approved`

Last modified January 31 15:41 EST 2023. Contains 359976 sequences. (Running on oeis4.)