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A059118
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Composite solutions to sigma(x)+8 = sigma(x+8).
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3
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27, 1615, 1885, 218984, 4218475, 312016315, 746314601, 1125845307, 1132343549, 1296114929, 9016730984, 303419868239, 1197056419121, 2065971192041, 2948269852109, 4562970154601
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OFFSET
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1,1
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COMMENTS
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REFERENCES
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LINKS
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EXAMPLE
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sigma(27)+8 = 48 = sigma(27+8), so 27 is in the sequence.
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MATHEMATICA
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ta={{0}}; Do[If[Equal[DivisorSigma[1, n+8] -DivisorSigma[1, n]-8, 0]&&!PrimeQ[n], Print[n]; ta=Append[ta, n]], {n, 1000000000, 1300000000}]; ta=Delete[ta, 1] (* Labos Elemer, Jan 10 2005 *)
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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