OFFSET
1,1
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[50000], DivisorSigma[1, #] + 6==DivisorSigma[1, # + 6] &] (* Vincenzo Librandi, Mar 10 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved