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Search: id:A003140
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| A003140 |
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Coprime chains with largest member p.
(Formerly M0896)
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+0
2
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| 1, 1, 2, 3, 9, 10, 19, 20, 32, 84, 85, 161, 212, 214, 260, 521, 818, 820, 1189, 1406, 1415, 2005, 2375, 3351, 5698, 6122, 6141, 6600, 6623, 7270
(list; graph; listen)
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OFFSET
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1,3
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
R. C. Entringer, The number of coprime chains with largest member n, Proc. Amer. Math. Soc., 16 (1965), 806-810.
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CROSSREFS
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Cf. A003139.
Sequence in context: A030743 A098020 A047358 this_sequence A057234 A109636 A057236
Adjacent sequences: A003137 A003138 A003139 this_sequence A003141 A003142 A003143
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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