OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..3000
EXAMPLE
5 is in the sequence since 3*5-8=7 and 3*5+8=23 are primes.
MATHEMATICA
Select[Prime[Range[7! ]], PrimeQ[3*#-8]&&PrimeQ[3*#+8]&]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Joseph Stephan Orlovsky, Dec 10 2009
STATUS
approved