A153136 Smallest sequence of primes such that no sum of at least two terms is prime.

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

Offset: 1

Author

Benoit Jubin, Dec 19 2008

Keywords

• more
• nonn

Crossrefs

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

Programs

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

Extensions

a(8)-a(10) from Donovan Johnson, Dec 23 2008