A046062 - OEIS

A046062

Primes of the form n*phi(n)+1 where phi(n) is the Euler function.

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