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Search: id:A113622
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| A113622 |
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Numbers n such that the reverse of the representation of phi(n) is a substring of n, in base 10. |
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+0
2
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| 1, 21, 63, 270, 291, 1065, 2991, 6102, 10087, 10279, 10654, 16528, 144069, 1440069, 10253179, 10657654, 14400069, 16163608
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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If p=480...023 is prime, then n=3*p=1440...069 and phi(n)=960...044, thus n belongs to the sequence.
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EXAMPLE
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phi(1_440069) = 960044.
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MATHEMATICA
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lst = {}; Do[If[{}!= StringPosition[ToString@n, StringReverse@ToString@EulerPhi@n], AppendTo[lst, n], {n, 2*10^7}]; lst
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CROSSREFS
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Cf. A069215.
Adjacent sequences: A113619 A113620 A113621 this_sequence A113623 A113624 A113625
Sequence in context: A082060 A025525 A033850 this_sequence A069215 A115921 A072395
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KEYWORD
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base,nonn
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AUTHOR
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Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 26 2006
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