login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A011986 Covering numbers C(n,7,4) (next term is <= 19). 0
1, 5, 5, 9, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

8,2

REFERENCES

CRC Handbook of Combinatorial Designs, 1996, p. 263.

LINKS

Table of n, a(n) for n=8..12.

D. Gordon, La Jolla Repository of Coverings

Index entries for covering numbers

CROSSREFS

Sequence in context: A333154 A333141 A290968 * A047880 A058491 A058584

Adjacent sequences:  A011983 A011984 A011985 * A011987 A011988 A011989

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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 15 00:05 EDT 2020. Contains 335762 sequences. (Running on oeis4.)