

A226977


Places n where A225867(n) <= 2.


2



7, 8, 11, 17, 23, 29, 41, 47, 59, 71, 239, 359, 419, 839
(list;
graph;
refs;
listen;
history;
text;
internal format)



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


LINKS

Table of n, a(n) for n=1..14.


PROG

(PARI) is(n)=for(k=2, n\21, if(sumdiv(n+k, d, (n+d)%k==0 && d>1)>2, return(0))); n>6 \\ Charles R Greathouse IV, Nov 25 2014


CROSSREFS

Cf. A225867, A049002.
Sequence in context: A145826 A102963 A117619 * A098731 A294483 A105740
Adjacent sequences: A226974 A226975 A226976 * A226978 A226979 A226980


KEYWORD

nonn,more


AUTHOR

Vladimir Shevelev, Jun 27 2013


STATUS

approved



