A011980 Covering numbers C(n,5,3).

1, 4, 5, 8, 12, 17, 20

Offset

5,2

Comments

a(12) <= 29.

References

CRC Handbook of Combinatorial Designs, 1996, p. 262.

Links

Table of n, a(n) for n=5..11.

D. Gordon, La Jolla Repository of Coverings.

Wikipedia, Covering design.

Index entries for covering numbers.

Crossrefs

Sequence in context: A188077 A370428 A027975 * A260163 A362560 A061765

Adjacent sequences: A011977 A011978 A011979 * A011981 A011982 A011983

Keyword

nonn,hard,more

Author

N. J. A. Sloane

Status

approved