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

1,1

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.

Links

Table of n, a(n) for n=1..19.

Formula

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

Crossrefs

Sequence in context: A081734 A058362 A213463 * A215264 A307115 A079332

Adjacent sequences: A175318 A175319 A175320 * A175322 A175323 A175324

Keyword

nonn

Author

Jason Kimberley, Apr 04 2010

Status

approved