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Search: id:A003275
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| A003275 |
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Values of phi(n) = phi(n+1).
(Formerly M1874)
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+0
2
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| 1, 2, 8, 48, 80, 96, 128, 240, 288, 480, 1008, 1200, 1296, 1440, 1728, 2592, 2592, 4800, 5600, 6480, 8640, 11040, 12480, 14976, 19008, 19200, 22464, 24320, 24576
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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R. K. Guy, Unsolved Problems Number Theory, Sect. B36.
L. Moser, Some equations involving Euler's totient function, Amer. Math. Monthly, 56 (1949), 22-23.
K. Miller, Solutions of phi(n) = phi(n+1) for 1 <= n <= 500000. Unpublished, 1972. [ Cf. Math. Comp., Vol. 27, p. 447-448, 1973 ].
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..2567
Eric Weisstein's World of Mathematics, Totient Function
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CROSSREFS
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Cf. A000010, A001274.
Adjacent sequences: A003272 A003273 A003274 this_sequence A003276 A003277 A003278
Sequence in context: A102009 A135904 A009566 this_sequence A078558 A003032 A058928
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KEYWORD
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nonn,nice
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AUTHOR
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njas
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