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A175321
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Integers greater than 120 million which cannot be represented as half-sums (averages) of two primes with indices that are primes with prime indices.
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1
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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)
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OFFSET
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1,1
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COMMENTS
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Appears to be complete with 19 terms. If a(20) exists, it is greater than 10^9.
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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