OFFSET
1,2
LINKS
MAPLE
A105825:= n-> (numtheory[sigma](n) mod 5):
seq (A105825(n), n=1..105); # Jani Melik, Jan 26 2011
MATHEMATICA
Mod[DivisorSigma[1, Range[110]], 5] (* Harvey P. Dale, Oct 03 2013 *)
PROG
(PARI) a(n)=sigma(n)%5
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Shyam Sunder Gupta, May 05 2005
STATUS
approved