A011988 Covering numbers C(n,7,5).

1, 6, 9, 20

Offset

7,2

Comments

a(11) <= 34.

References

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

Links

Table of n, a(n) for n=7..10.

D. Gordon, La Jolla Repository of Coverings.

Wikipedia, Covering design.

Index entries for covering numbers.

Crossrefs

Sequence in context: A023041 A118277 A103186 * A161782 A154783 A096546

Adjacent sequences: A011985 A011986 A011987 * A011989 A011990 A011991

Keyword

nonn,hard,more

Author

N. J. A. Sloane

Status

approved