OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..3000
MATHEMATICA
Select[Range[1000], Divisible[DivisorSigma[1, #], EulerPhi[6 + #]] &] (* David Nacin, Mar 01 2012 *)
PROG
(PARI) is(n)=sigma(n)%(eulerphi(n)+6)==0 \\ Charles R Greathouse IV, Sep 25 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved