OFFSET
1,1
COMMENTS
If 2n+1 is a prime then a(n) = 2n+1.
LINKS
Ray Chandler, Table of n, a(n) for n=1..10000
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Shevelev, May 18 2008
EXTENSIONS
Extended by Ray Chandler, May 20 2008, May 24 2008
STATUS
approved