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A069050 Numbers k such that 2^k mod phi(k) = 2^phi(k) mod k. 1
1, 2, 4, 8, 16, 32, 64, 108, 128, 188, 224, 252, 256, 288, 296, 336, 448, 504, 512, 576, 672, 716, 972, 1008, 1024, 1404, 1472, 2016, 2048, 2268, 2808, 3324, 3888, 4096, 4860, 5184, 5500, 6480, 7776, 8192, 8748, 8952, 9720, 9896, 11000, 11104, 12256 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MATHEMATICA
Select[Range[13000], PowerMod[2, #, EulerPhi[#]]==PowerMod[2, EulerPhi[ #], #]&] (* Harvey P. Dale, Aug 21 2016 *)
CROSSREFS
Sequence in context: A335853 A247213 A302934 * A343844 A059174 A258585
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Apr 03 2002
STATUS
approved

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)