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A011977
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Covering numbers C(n,5,2).
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3
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1, 3, 3, 4, 5, 6, 7, 9, 10, 12, 13, 15, 16, 18, 19, 21, 21, 27, 28, 30, 30, 37, 38, 40
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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5,2
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COMMENTS
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It is known that 42 <= a(29) <= 43. The next few values are known: a(30) = 48, a(31) = 50, a(32) = 52. - Nathaniel Johnston, Jan 10 2024
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REFERENCES
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CRC Handbook of Combinatorial Designs, 1996, p. 262.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,hard
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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