A011978 Covering numbers C(n,6,2).

1, 3, 3, 3, 4, 6, 6, 7, 7, 10, 10, 12, 12, 15, 16, 17, 19

Offset

6,2

References

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

Links

Table of n, a(n) for n=6..22.

Dan Gordon, La Jolla Repository of Coverings

Index entries for covering numbers

Crossrefs

Sequence in context: A151554 A221028 A334940 * A167025 A238505 A259897

Adjacent sequences: A011975 A011976 A011977 * A011979 A011980 A011981

Keyword

nonn,hard,more

Author

N. J. A. Sloane

Extensions

a(19)-a(22) added from Dan Gordon's web site by Jinyuan Wang, Sep 21 2023

Status

approved