OFFSET
1,1
COMMENTS
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
EXAMPLE
119 appears in the sequence since sigma(sigma(119) - 119 - 3)/phi(119 - phi(119) + 3) = sigma(22)/phi(26) = 36/12 = 3.
MAPLE
MATHEMATICA
Select[Range[1000], DivisorSigma[1, DivisorSigma[1, #] - # - 3]/EulerPhi[# - EulerPhi[#] + 3] == 3 &] (* Alonso del Arte, Jan 01 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, Dec 27 2013
STATUS
approved