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A065894
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Number of composites <= 10^n.
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4
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0, 5, 74, 831, 8770, 90407, 921501, 9335420, 94238544, 949152465, 9544947488, 95881945186, 962392087981, 9653934463160, 96795058249197, 970155429577330, 9720761658966074, 97376442842345766, 975260045712259139, 9765942332723655392, 97779180397439081159
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OFFSET
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0,2
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COMMENTS
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Also, the order number of 10^n as a composite number.
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LINKS
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FORMULA
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EXAMPLE
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10 is the 5th composite number: 4,6,8,9,10.
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MATHEMATICA
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Table[ 10^n- (PrimePi[10^n]) -1, {n, 1, 13} ]
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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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