OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[4200], Divisible[DivisorSigma[1, #+5], EulerPhi[#]+5]&] (* Harvey P. Dale, May 09 2019 *)
PROG
(PARI) is(n)=!(sigma(n+5)%(eulerphi(n)+5)) \\ Charles R Greathouse IV, Sep 25 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected by Charles R Greathouse IV, Sep 25 2012
STATUS
approved