The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A046153 Primes of the form m*2^phi(m)-1 with phi(m) the Euler function, in order of increasing m. 1
 3, 11, 79, 23, 127, 191, 1114111, 1151, 5119, 6143, 654311423, 172031, 88774955854727217151, 1618481116086271, 107221699928436768767, 7421703487487, 120946279055359, 145135534866431, 47287796087390207 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Sorted along increasing n of the definition. LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..45 MAPLE with(numtheory); for n from 1 to 1000 do x := n*2^phi(n)-1: if isprime(x) then print(x): fi:od: MATHEMATICA Select[Table[m*2^EulerPhi[m]-1, {m, 1, 170}], PrimeQ] (* Jean-François Alcover, Apr 04 2011 *) CROSSREFS Cf. A046154. Sequence in context: A197064 A117765 A220146 * A163856 A232468 A099341 Adjacent sequences: A046150 A046151 A046152 * A046154 A046155 A046156 KEYWORD nonn,nice AUTHOR Felice Russo EXTENSIONS More terms from Jud McCranie, Jan 26 2000 STATUS approved

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

Last modified December 7 18:28 EST 2023. Contains 367660 sequences. (Running on oeis4.)