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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. 1
121625477, 122333819, 123043313, 124851563, 126163468, 126613411, 126626011, 126636371, 127658702, 129906953, 131093747, 138737792, 142368959, 147338216, 149348951, 152446388, 157519459, 161172208, 161352166 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 22 00:52 EDT 2019. Contains 328315 sequences. (Running on oeis4.)