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A011987
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Covering numbers C(n,6,5) (next term is <= 100).
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2
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OFFSET
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6,2
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REFERENCES
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CRC Handbook of Combinatorial Designs, 1996, p. 263.
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LINKS
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Table of n, a(n) for n=6..10.
D. Gordon, La Jolla Repository of Coverings
K. J. Nurmela and Patric R. J. Östergård, New coverings of t-sets with (t+1)-sets, J. Combinat. Designs, 7 (1999), 217-226.
K. J. Nurmela and Patric R. J. Östergård, New coverings of t-sets with (t+1)-sets (appendix), J. Combinat. Designs, 7 (1999), 217-226.
Index entries for covering numbers
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CROSSREFS
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A column of A066010.
Sequence in context: A161348 A071342 A125056 * A036690 A229746 A256579
Adjacent sequences: A011984 A011985 A011986 * A011988 A011989 A011990
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KEYWORD
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nonn,hard
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AUTHOR
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N. J. A. Sloane
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STATUS
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approved
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