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A003140
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Coprime chains with largest member p.
(Formerly M0896)
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1
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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; refs; listen; history; internal format)
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OFFSET
| 1,3
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REFERENCES
| R. C. Entringer, The number of coprime chains with largest member n, Proc. Amer. Math. Soc., 16 (1965), 806-810.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Cf. A003139.
Sequence in context: A030743 A098020 A047358 * A057234 A109636 A057236
Adjacent sequences: A003137 A003138 A003139 * A003141 A003142 A003143
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KEYWORD
| nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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