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A011984 Covering numbers C(n,6,4) (next term is <= 41). 0
5, 7, 12, 20, 32 (list; graph; refs; listen; history; text; internal format)
OFFSET
6,1
REFERENCES
CRC Handbook of Combinatorial Designs, 1996, p. 263.
LINKS
Table of n, a(n) for n=6..10.
D. Gordon, La Jolla Repository of Coverings
Index entries for covering numbers
CROSSREFS
Sequence in context: A160243 A247027 A020686 * A280291 A195557 A063187
Adjacent sequences: A011981 A011982 A011983 * A011985 A011986 A011987
KEYWORD
nonn,more,hard
AUTHOR
N. J. A. Sloane.
STATUS
approved

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Last modified June 8 17:52 EDT 2024. Contains 373227 sequences. (Running on oeis4.)