A153136 - OEIS

%I #8 Jan 29 2015 23:39:50

%S 2,7,13,43,103,1627,25349,315743,7338823,42939980423

%N Smallest sequence of primes such that no sum of at least two terms is prime

%o (PARI) a=[];for(n=1,10, forprime(p=2,,setsearch(a,p)&&next;for(i=1,2^#a-1,isprime(normlp(vecextract(a,i),1)+p)&&next(2));a=concat(a,p);print1(p","))) \\ Very simplistic, should at least avoid an odd number of odd primes in the partial sum of earlier terms. \\ _M. F. Hasler_, Jan 29 2015

%Y Cf. A153137, A153138, A133660, A052349, A254337, A254341.

%K more,nonn

%O 1,1

%A _Benoit Jubin_, Dec 19 2008

%E a(8)-a(10) from _Donovan Johnson_, Dec 23 2008