OFFSET
1,1
COMMENTS
For primes in this sequence (prime interprimes of third order) see A126557.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
PROG
(PARI) {m=250000; a=0; g=0; p=2; q=3; r=5; while(r<=m, if((p+r)/2==q, if(a>0, b=(a+q)/2; if(isprime(b), if(g>0, print1(h=(g+b)/2, ", ")); g=b)); a=q); p=q; q=r; r=nextprime(r+1))} \\ Klaus Brockhaus, Jan 11 2007
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Dec 27 2006
EXTENSIONS
Edited by Klaus Brockhaus, Jan 11 2007
STATUS
approved