The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A320041 Primes that are values of A215240. 2
 3, 13, 6163, 8311, 12097, 13159, 14957, 18433, 21061, 23627, 24571, 27061, 29863, 35617, 40897, 44221, 45307, 45737, 45821, 67421, 68113, 69313, 71237, 75377, 82903, 89227, 89269, 89671, 94543, 100483, 101533, 101833, 113683, 114827, 118903, 121763, 122167, 125933, 131581, 131617, 143461, 144061 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Values of A215240(A320061), sorted. LINKS Robert Israel, Table of n, a(n) for n = 1..594 EXAMPLE a(3) = 6163 is in the sequence because it is prime and A215240(264) = 6163. MAPLE N:= 10^5: # to get all terms <= N f:= n -> convert(numtheory:-invphi(n), `+`): Res:= {}: for n from 1 to N do   v:= f(n);   if isprime(v) and v <= N then      Res:= Res union {v}   fi od: Res; CROSSREFS Cf. A215240, A320061. Sequence in context: A108583 A127855 A087333 * A016104 A112856 A007523 Adjacent sequences:  A320038 A320039 A320040 * A320042 A320043 A320044 KEYWORD nonn AUTHOR Robert Israel and J. M. Bergot, Oct 03 2018 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.

Last modified August 6 16:05 EDT 2020. Contains 336255 sequences. (Running on oeis4.)