A175321 Integers greater than 120 million which cannot be represented as half-sums (averages) of two primes with indices that are primes with prime indices.

121625477, 122333819, 123043313, 124851563, 126163468, 126613411, 126626011, 126636371, 127658702, 129906953, 131093747, 138737792, 142368959, 147338216, 149348951, 152446388, 157519459, 161172208, 161352166

Offset: 1

Author

Jason Kimberley, Apr 04 2010

Keywords

• nonn

Comments

Appears to be complete with 19 terms. If a(20) exists, it is greater than 10^9.

Computed at the suggestion of Jonathan Vos Post.

Formula

a(n)=A175320(n+1578708).