OFFSET
1,2
LINKS
Daniel Starodubtsev, Table of n, a(n) for n = 1..10000
MATHEMATICA
s={}; Do[If[Union[PrimeQ/@{151*n+149, 149*n+151, 137*n+139, 139*n+137}]=={True}, s=Append[s, n]], {n, 100000}]; s
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Jun 03 2005
EXTENSIONS
a(1)=0 inserted by Daniel Starodubtsev, Feb 09 2020
STATUS
approved