login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A011987
Covering numbers C(n,6,5) (next term is <= 100).
2
1, 6, 12, 30, 50
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
6,2
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
K. J. Nurmela and Patric R. J. Östergård,
New coverings of t-sets with (t+1)-sets
, J. Combinat. Designs, 7 (1999), 217-226.
K. J. Nurmela and Patric R. J. Östergård,
New coverings of t-sets with (t+1)-sets (appendix)
, J. Combinat. Designs, 7 (1999), 217-226.
Index entries for covering numbers
CROSSREFS
A column of
A066010
.
Sequence in context:
A161348
A071342
A125056
*
A036690
A229746
A256579
Adjacent sequences:
A011984
A011985
A011986
*
A011988
A011989
A011990
KEYWORD
nonn
,
hard
AUTHOR
N. J. A. Sloane
STATUS
approved
Lookup
|
Welcome
|
Wiki
|
Register
|
Music
|
Plot 2
|
Demos
|
Index
|
Browse
|
More
|
WebCam
Contribute new seq. or comment
|
Format
|
Style Sheet
|
Transforms
|
Superseeker
|
Recents
The OEIS Community
| Maintained by
The OEIS Foundation Inc.
License Agreements, Terms of Use, Privacy Policy.
.
Last modified July 17 09:45 EDT 2024. Contains 374364 sequences. (Running on oeis4.)