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A003140 Coprime chains with largest member p.
(Formerly M0896)
+0
2
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)
OFFSET

1,3

REFERENCES

R. C. Entringer, The number of coprime chains with largest member n, Proc. Amer. Math. Soc., 16 (1965), 806-810.

CROSSREFS

Cf. A003139.

Sequence in context: A030743 A098020 A047358 this_sequence A057234 A109636 A057236

Adjacent sequences: A003137 A003138 A003139 this_sequence A003141 A003142 A003143

KEYWORD

nonn,nice

AUTHOR

njas

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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