OFFSET
1,1
COMMENTS
See A088012 for the subsequence of odd terms, only 7 being known up to 10^13. - M. F. Hasler, Feb 21 2017
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
abu[x_] := Abs[DivisorSigma[1, x]-2*x] Do[If[ !Greater[abu[n], Log[n]//N], Print[n]], {n, 1, 100000}]
PROG
(PARI) (is(n)=abs(sigma(n)-2*n)<log(n)); select(is, [1..5000]) \\ M. F. Hasler, Feb 21 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Oct 20 2003
STATUS
approved