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Search: id:A072392
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| A072392 |
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Numbers n such that reverse(n) = phi(n) (mod n). |
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+0
1
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| 21, 27, 37, 63, 270, 291, 397, 1545, 1853, 2991, 6102, 15503, 27036, 48776
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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reverse(48776) = 67784 = 19008 (mod 48776) and 19008 = phi(48776), so 48776 is a term of the sequence.
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MATHEMATICA
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Select[Range[10^5], Mod[ FromDigits[Reverse[IntegerDigits[n]]], # ] == EulerPhi[ # ] &]
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CROSSREFS
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Sequence in context: A134935 A064507 A103246 this_sequence A098898 A098768 A114168
Adjacent sequences: A072389 A072390 A072391 this_sequence A072393 A072394 A072395
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KEYWORD
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base,nonn
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AUTHOR
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Joseph L. Pe (JosephL.Pe(AT)hotmail.com), Jul 21 2002
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