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A011987 Covering numbers C(n,6,5) (next term is <= 100). +0
3
1, 6, 12, 30, 50 (list; graph; listen)
OFFSET

6,2

REFERENCES

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

LINKS

D. Gordon, La Jolla Repository of Coverings

K. J. Nurmela and P. R. J. Ostergard, New coverings of t-sets with (t+1)-sets, J. Combinat. Designs, 7 (1999), 217-226.

K. J. Nurmela and P. R. J. Ostergard, 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 this_sequence A036690 A014131 A122211

Adjacent sequences: A011984 A011985 A011986 this_sequence A011988 A011989 A011990

KEYWORD

nonn,hard

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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