OFFSET
1,1
COMMENTS
Motivated by A076496 comment: if n=6p, p>3 prime, then Mod(sigma(n),n)=12. So this sequence is included in A076496, but not in A084306.
Next term > 10^11. - Donovan Johnson, Sep 27 2012
EXAMPLE
sigma(24) = 60 = 2*24+12, but 24/6=4 is not prime.
PROG
(PARI) isOk(n) = { return ((n % 6 == 0) && (! isprime(n/6)) && (sigma(n) % n == 12)); }
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Marcus, Sep 15 2012
STATUS
approved