login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A117292 a(n) = (n-phi(n))^phi(n). 1
0, 1, 1, 4, 1, 16, 1, 256, 729, 1296, 1, 4096, 1, 262144, 5764801, 16777216, 1, 2985984, 1, 429981696, 282429536481, 61917364224, 1, 4294967296, 95367431640625, 56693912375296, 150094635296999121, 281474976710656, 1, 54875873536, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..200

EXAMPLE

a(12) = (12-phi(12))^phi(12) = 8^4 = 4096.

MATHEMATICA

ep[n_]:=Module[{phi=EulerPhi[n]}, (n-phi)^phi]; Array[ep, 40] (* Harvey P. Dale, Sep 30 2011 *)

PROG

(PARI) a(n)=(n-phi(n))^phi(n) \\ Charles R Greathouse IV, Jun 01 2013

CROSSREFS

Sequence in context: A197653 A146160 A059222 * A062780 A262616 A309074

Adjacent sequences:  A117289 A117290 A117291 * A117293 A117294 A117295

KEYWORD

nonn

AUTHOR

Luc Stevens (lms022(AT)yahoo.com), Apr 23 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 14 19:27 EST 2019. Contains 329987 sequences. (Running on oeis4.)