OFFSET
1,1
COMMENTS
Except for a(2)=8, all terms are prime.
Is this sequence finite?
There are no other terms up to 86000. - Peter J. C. Moses, Jun 28 2013
There are no more terms up to 10^9. - Charles R Greathouse IV, Nov 25 2014
PROG
(PARI) is(n)=for(k=2, n\2-1, if(sumdiv(n+k, d, (n+d)%k==0 && d>1)>2, return(0))); n>6 \\ Charles R Greathouse IV, Nov 25 2014
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Vladimir Shevelev, Jun 27 2013
STATUS
approved