OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
EXAMPLE
127 is the 31st prime and 127+31 = 158 is composite.
MATHEMATICA
Do[s=Prime[n]+n; If[ !PrimeQ[s], Print[Prime[n]]], {n, 1, 100}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Apr 02 2003
STATUS
approved