OFFSET
1,1
EXAMPLE
a(3)=a(4)=6 as 7+6=13, 11+6=17, 13+6=19 and 17+6=23 are all prime.
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Amarnath Murthy, Sep 17 2003
EXTENSIONS
Edited by Don Reble, Sep 23 2003
STATUS
approved