A046062 revision #7
|
|
A046062
|
|
Primes of the form n*phi(n)+1 where phi(n) is the Euler function.
|
|
2
|
|
|
2, 3, 7, 13, 43, 41, 157, 109, 193, 313, 487, 337, 241, 661, 433, 937, 641, 881, 1013, 769, 1249, 2053, 1861, 2269, 3121, 1321, 4423, 3037, 3001, 4621, 1873, 6163, 2017, 5441, 3613, 2161, 6553, 4049, 5581
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Listed in order of increasing n.
|
|
LINKS
|
|
|
EXAMPLE
|
7 because 3*phi(3)+1=7 is prime.
|
|
MATHEMATICA
|
Select[Array[# EulerPhi[#]+1&, 500], PrimeQ] (* From Harvey P. Dale, Apr 21 2012 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
easy,nice,nonn
|
|
AUTHOR
|
Felice Russo (frusso(AT)micron.com)
|
|
STATUS
|
editing
|
|
|
|