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Search: id:A074915
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| A074915 |
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Largest x such that the number of nonprimes (i.e. 1 and composites) in the reduced residue set (RSS(x)) of x equals n, or 0 if there are no such numbers. |
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+0
1
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| 30, 60, 90, 84, 120, 210, 50, 150, 126, 180, 132, 168, 0, 138, 240, 144, 140, 330, 420, 130, 300, 92, 390, 234, 294, 228, 360, 222, 160, 246, 0, 336, 276, 630, 510, 450, 378, 152, 480, 280, 318, 196, 342, 660, 165, 396, 172, 546, 250, 840, 504, 408, 350, 600
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OFFSET
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1,1
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COMMENT
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It is conjectured that x is always bounded.
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FORMULA
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a(n)=Max{x; A048864(x)=n}; a(n)=0 if no such number exists [See A072023].
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EXAMPLE
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One nonprime [=1] is in RRS of {1,2,3,4,6,8,12,18,24,30}; min=1,max=30. See A048597.Two nonprimes are in RRS of {5,10,14,20,42,60}; min=A072022[2], max=a[2]=60 here.For entries of A072023 neither min, no max is believed to exist.
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CROSSREFS
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Cf. A072022, A072023, A048864, A048597, A048865, A072022, A000010, A000720, A001221.
Sequence in context: A051283 A066031 A071140 this_sequence A056954 A050519 A069819
Adjacent sequences: A074912 A074913 A074914 this_sequence A074916 A074917 A074918
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Oct 10 2002
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