OFFSET
1,1
COMMENTS
The first number q in each quadruplet is in A069142 (equivalent to selecting twin primes q which are also Sophie-Germain primes). [From R. J. Mathar, May 06 2010]
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Juri-Stepan Gerasimov, Apr 26 2010, May 01 2010, May 07 2010
EXTENSIONS
Corrected (2131 replaced by 3331) by R. J. Mathar, May 06 2010
STATUS
approved