OFFSET
1,1
MATHEMATICA
Select[2#+1&/@Union[Total/@Tuples[Prime[Range[50]], 2]], PrimeQ] (* Harvey P. Dale, Oct 12 2019 *)
PROG
(PARI) {z=410; v=[]; p=2; while(2*(p+2)+1<z, q=2; while((n=2*(p+q)+1)<z, if(isprime(n), v=concat(v, n)); q=nextprime(q+1)); p=nextprime(p+1)); v=vecsort(v); m=0; for(j=1, length(v), if(m<v[j], m=v[j]; print1(m, ", ")))} - Klaus Brockhaus, Sep 19 2004
CROSSREFS
KEYWORD
nonn
AUTHOR
Giovanni Teofilatto, Sep 18 2004
EXTENSIONS
Edited and extended by Klaus Brockhaus, Sep 19 2004
STATUS
approved