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A163764
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Sqrt(sigma(2*m^2)), where m=A097023(n), i.e., sigma(2m^2) is a square.
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1
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543, 651, 5187, 5973, 7161, 8463, 57057, 93093, 66063, 81003, 80199, 98553, 130851, 160797, 216657, 259749, 347529, 561393, 565383, 726693, 882189, 1042587, 1084083, 922467, 1439361, 1242927, 1768767, 1490139, 2383227, 2857239
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Select[Table[Sqrt[DivisorSigma[1, 2 n^2]], {n, 1000000}], IntegerQ[#] &] (* Tanya Khovanova, Jun 18 2021)
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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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