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A006872
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phi(n) = phi(sigma(n)).
(Formerly M2984)
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5
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1, 3, 15, 26, 39, 45, 74, 104, 111, 117, 122, 146, 175, 183, 195, 219, 296, 314, 333, 357, 386, 471, 488, 549, 554, 555, 579, 584, 585, 608, 626, 646, 657, 794, 831, 842, 914, 915, 939, 962, 1071, 1082, 1095, 1191, 1226, 1256, 1263, 1292, 1322, 1346
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| S. W. Golomb, Equality among number-theoretic functions, Abstract 882-11-16, Abstracts Amer. Math. Soc., 14 (1993), 415-416.
R. K. Guy, Unsolved Problems in Number Theory, B42.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
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CROSSREFS
| Cf. A000010.
Sequence in context: A046280 A046283 A160991 * A027179 A121250 A105549
Adjacent sequences: A006869 A006870 A006871 * A006873 A006874 A006875
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KEYWORD
| nonn
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AUTHOR
| Jeffrey Shallit, N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Jud McCranie, JudMcCranie(AT)ugaalum.uga.edu.
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