OFFSET
1,1
LINKS
Iain Fox, Table of n, a(n) for n = 1..10000
PROG
(Magma) [p: p in PrimesUpTo(10000)|IsPrime(2*p-1) and IsPrime(6*p-1)] // Vincenzo Librandi, Jan 29 2011
(PARI) lista(nn) = forprime(p=2, nn, if(isprime(2*p - 1) && isprime(6*p - 1), print1(p, ", "))) \\ Iain Fox, Jan 20 2018
CROSSREFS
KEYWORD
nonn,easy,less
AUTHOR
Juri-Stepan Gerasimov, Feb 06 2010
EXTENSIONS
Corrected and extended by Charles R Greathouse IV, Mar 25 2010
STATUS
approved