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Search: id:A074241
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| A074241 |
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Numbers n such that phi(n+1) = reverse(phi(n)). |
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+0
1
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OFFSET
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1,2
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EXAMPLE
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phi(129 + 1) = 48 = reverse(84) = reverse(phi(129)), so 129 is a term of the sequence.
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MATHEMATICA
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Select[Range[10^5], FromDigits[Reverse[IntegerDigits[EulerPhi[ # ]]]] == EulerPhi[ # + 1] &]
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CROSSREFS
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Sequence in context: A113077 A135255 A075475 this_sequence A117694 A108210 A006717
Adjacent sequences: A074238 A074239 A074240 this_sequence A074242 A074243 A074244
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KEYWORD
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nonn,base
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AUTHOR
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Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Sep 18 2002
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