OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
EXAMPLE
The divisors of 10 are: 1, 2, 5, 10 (4 divisors). 10 and 4 are both congruent to 1 modulo 3. Thus 10 is a member of this sequence.
MATHEMATICA
Select[Range[1, 500, 3], Mod[DivisorSigma[0, #], 3] == 1 &] (* T. D. Noe, Jul 09 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Gerasimov Sergey, Jul 05 2012
STATUS
approved