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0, 1, 1, 2, 1, 2, 1, 2, 3, 4, 5, 2, 7, 4, 1, 2, 3, 4, 9, 2, 955, 468
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,4
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COMMENTS
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LINKS
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FORMULA
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EXAMPLE
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a(10) = 4 because A033875(10) = 31, 31 + 2^4 = 47, which is prime.
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MATHEMATICA
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p = 2; n = 0; While[true, x = 0; While[ ! PrimeQ[p + 2^x], x++ ]; p = p + 2^x; Print[x]; n++ ]
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CROSSREFS
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Skipping from prime to prime by least powers of 2: A033875.
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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