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 A117291 a(n) = phi(n)^(n-phi(n)) 1
 1, 1, 2, 4, 4, 16, 6, 256, 216, 4096, 10, 65536, 12, 1679616, 2097152, 16777216, 16, 2176782336, 18, 68719476736, 5159780352, 1000000000000, 22, 281474976710656, 3200000, 1283918464548864, 198359290368, 184884258895036416, 28 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..200 EXAMPLE a(9) = phi(9)^(9-phi(9)) = 6^3 = 216 MATHEMATICA ep[n_]:=Module[{p=EulerPhi[n]}, p^(n-p)]; Array[ep, 30] (* Harvey P. Dale, Mar 25 2014 *) PROG (PARI) a(n) = eulerphi(n)^(n-eulerphi(n))  \\ Michel Marcus, Jun 01 2013 CROSSREFS Sequence in context: A077815 A218075 A064449 * A246047 A079102 A071337 Adjacent sequences:  A117288 A117289 A117290 * A117292 A117293 A117294 KEYWORD nonn AUTHOR Luc Stevens (lms022(AT)yahoo.com), Apr 23 2006 EXTENSIONS Corrected by Michel Marcus, Jun 01 2013 STATUS approved

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Last modified January 21 16:22 EST 2020. Contains 331114 sequences. (Running on oeis4.)