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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A011984 Covering numbers C(n,6,4) (next term is <= 41). 0 5, 7, 12, 20, 32 (list; graph; refs; listen; history; text; internal format) OFFSET 6,1 REFERENCES CRC Handbook of Combinatorial Designs, 1996, p. 263. LINKS Table of n, a(n) for n=6..10. D. Gordon, La Jolla Repository of Coverings Index entries for covering numbers CROSSREFS Sequence in context: A373669 A247027 A020686 * A280291 A195557 A063187 Adjacent sequences: A011981 A011982 A011983 * A011985 A011986 A011987 KEYWORD nonn,more,hard AUTHOR N. J. A. Sloane. STATUS approved

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Last modified August 18 07:06 EDT 2024. Contains 375255 sequences. (Running on oeis4.)