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A057811
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Numbers k such that pi(k) is even.
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2
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1, 3, 4, 7, 8, 9, 10, 13, 14, 15, 16, 19, 20, 21, 22, 29, 30, 37, 38, 39, 40, 43, 44, 45, 46, 53, 54, 55, 56, 57, 58, 61, 62, 63, 64, 65, 66, 71, 72, 79, 80, 81, 82, 89, 90, 91, 92, 93, 94, 95, 96, 101, 102, 107, 108, 113, 114, 115, 116, 117, 118, 119
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OFFSET
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1,2
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LINKS
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FORMULA
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Chang & Li show that a(n) < 64n + o(1), and a(n) < 8n + o(1) under the Hardy-Littlewood prime tuples conjecture. - Charles R Greathouse IV, Dec 19 2014
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MATHEMATICA
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Select[Range[120], EvenQ[PrimePi[#]]&] (* Harvey P. Dale, Apr 10 2024 *)
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PROG
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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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