A097358 Primes of the form 2(p+q) + 1, p and q prime.

11, 13, 17, 19, 29, 31, 37, 41, 43, 53, 61, 67, 73, 79, 89, 97, 101, 109, 113, 127, 137, 139, 149, 151, 157, 163, 173, 181, 193, 197, 199, 211, 223, 229, 233, 241, 257, 269, 277, 281, 283, 293, 307, 313, 317, 331, 337, 349, 353, 367, 373, 389, 397, 401, 409

Offset

1,1

Links

Table of n, a(n) for n=1..55.

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

Sequence in context: A052259 A103900 A337803 * A230462 A215927 A229947

Adjacent sequences: A097355 A097356 A097357 * A097359 A097360 A097361

Keyword

nonn

Author

Giovanni Teofilatto, Sep 18 2004

Extensions

Edited and extended by Klaus Brockhaus, Sep 19 2004

Status

approved