OFFSET
1,1
COMMENTS
p+2 is prime for all members p except 7. - David Wasserman, Jan 20 2005
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
PROG
(Magma) a:=[]; for k in PrimesInInterval(2, 3000) do b:={}; for s in [k..NextPrime(k)-1] do if not IsPrime(s) then b:=b join Set(PrimeDivisors(s)); end if; end for; if #Set(b) eq 3 then Append(~a, k); end if; end for; a; // Marius A. Burtea, Sep 26 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Sep 26 2002
EXTENSIONS
More terms from David Wasserman, Jan 20 2005
STATUS
approved