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A097604
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Floor( phi(n)*sqrt(2n) ) - n.
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1
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0, 0, 1, 1, 7, 0, 15, 8, 16, 7, 35, 7, 48, 17, 28, 29, 76, 18, 91, 30, 56, 44, 126, 31, 116, 60, 105, 61, 184, 31, 205, 96, 129, 97, 165, 65, 272, 118, 172, 103, 321, 67, 346, 143, 182, 165, 398, 108, 366, 150, 272, 192, 482, 133, 364, 197, 327, 243, 571, 115, 601, 272, 341
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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COMMENTS
| This is known to be always >= 0, i.e. that n/phi(n) <= sqrt(2n) holds for all n. This is a consequence of the stronger inequality in A079530.
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REFERENCES
| D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 9.
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CROSSREFS
| Cf. A079530, A097850.
Sequence in context: A005481 A122699 A169603 * A007393 A067152 A052440
Adjacent sequences: A097601 A097602 A097603 * A097605 A097606 A097607
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), based on emails from Alonso Del Arte (alonso.delarte(AT)gmail.com) and Jud McCranie (JudMcCranie(AT)ugaalum.uga.edu), Aug 30 2004
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