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A011990
Covering numbers C(n,9,5) (next term is <= 19).
0
1, 6, 7, 12
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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
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Last modified August 18 07:06 EDT 2024. Contains 375255 sequences. (Running on oeis4.)