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A014665
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Number of new fractions m/n, where (m,n)=1 and "new" means the value of mn has not occurred before.
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4
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1, 1, 2, 2, 4, 1, 6, 4, 6, 2, 10, 3, 12, 3, 5, 8, 16, 3, 18, 6, 7, 5, 22, 5, 20, 6, 18, 8, 28, 4, 30, 16, 12, 8, 18, 9, 36, 9, 14, 12, 40, 6, 42, 13, 17, 11, 46, 11, 42, 10, 19, 15, 52, 9, 25, 20, 21, 14, 58, 10, 60, 15, 28, 32, 29, 9, 66, 21, 26, 11, 70, 20, 72, 18, 23, 23, 42, 11, 78, 23, 54
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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REFERENCES
| S. W. Golomb, personal communication, Svalbard, Norway, 7/97.
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
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EXAMPLE
| {1}, {1/2}, {1/3,2/3}, {1/4,3/4}, {1/5,...,4/5}, {5/6}, ...
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CROSSREFS
| Sequence in context: A069922 A072211 A070306 * A055035 A204595 A173897
Adjacent sequences: A014662 A014663 A014664 * A014666 A014667 A014668
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Example corrected by and more terms from Olivier Gerard (02/99).
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