OFFSET
1,1
COMMENTS
LINKS
Jianing Song, Table of n, a(n) for n = 1..7575 (all terms <= 10^8)
EXAMPLE
3362 is a term since 3362 and sigma(3362) = 5169 are coprime.
3364 is a term since 3364 and sigma(3364) = 6097 are coprime.
PROG
(PARI) isA356382(n) = !(n%2) && gcd(n, sigma(n))==1
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jianing Song, Aug 07 2022
STATUS
approved