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Search: id:A115921
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| A115921 |
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Numbers n such that the decimal digits of phi(n) are a permutation of those of n. |
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+0
3
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| 1, 21, 63, 291, 502, 2518, 2817, 2991, 4435, 5229, 5367, 5637, 6102, 6174, 6543, 6822, 7236, 7422, 8022, 8541, 8982, 17631, 18231, 18261, 20301, 20518, 20617, 21058, 22471, 22851, 25196, 25918, 27615, 29817, 34816, 35683, 43218, 44305
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Contains A069215 and A113781; is itself a subsequence of A082060. - M. F. Hasler, Nov 28 2007
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EXAMPLE
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phi(20301)=13200, phi(6543)=4356.
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PROGRAM
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(PARI) for(n=1, 10^5, if(vecsort(Vecsmall(Str(n)))==vecsort(Vecsmall(Str(eulerphi(n)))), print1(n", "))) \\ - M. F. Hasler
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CROSSREFS
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Cf. A069215, A113781, A082060.
Sequence in context: A033850 A113622 A069215 this_sequence A072395 A113781 A033481
Adjacent sequences: A115918 A115919 A115920 this_sequence A115922 A115923 A115924
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KEYWORD
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nonn,base
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AUTHOR
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Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006
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EXTENSIONS
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Edited by M. F. Hasler (Maximilian.Hasler(AT)gmail.com), Nov 28 2007
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