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A086681
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Number of primes < 8^n.
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1
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0, 4, 18, 97, 564, 3512, 23000, 155611, 1077871, 7603553, 54400028, 393615806, 2874398515, 21151907950, 156661034233, 1166746786182, 8731188863470, 65612899915304, 494890204904784, 3745011184713964, 28423094496953330, 216289611853439384, 1649819700464785589
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OFFSET
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0,2
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LINKS
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FORMULA
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MATHEMATICA
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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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EXTENSIONS
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STATUS
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approved
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