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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

T. D. Noe, Table of n, a(n) for n=1..1000

EXAMPLE

7 because 3*phi(3)+1=7 is prime.

MATHEMATICA

Select[Array[# EulerPhi[#]+1&, 500], PrimeQ] (* Harvey P. Dale, Apr 21 2012 *)

CROSSREFS

Cf. A002618, A046078

Sequence in context: A056893 A051130 A078749 * A096263 A007996 A206579

Adjacent sequences:  A046059 A046060 A046061 * A046063 A046064 A046065

KEYWORD

easy,nice,nonn

AUTHOR

Felice Russo

STATUS

approved

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Last modified June 21 14:17 EDT 2021. Contains 345364 sequences. (Running on oeis4.)