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A246456
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a(n) = sigma(n + sigma(n)).
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9
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3, 6, 8, 12, 12, 39, 24, 24, 36, 56, 24, 90, 40, 60, 56, 48, 48, 80, 56, 96, 54, 90, 48, 224, 120, 126, 68, 224, 60, 216, 104, 120, 121, 180, 84, 128, 124, 171, 120, 252, 84, 288, 120, 255, 168, 180, 120, 308, 162, 168, 168, 372, 108, 360, 128, 372, 138, 266
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OFFSET
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1,1
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LINKS
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EXAMPLE
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For n = 6; a(n) = sigma(6 + sigma(6)) = sigma(18) = 39.
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PROG
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(Magma) [SumOfDivisors(n+SumOfDivisors(n)):n in[1..1000]]
(PARI)
vector(100, n, sigma(n+sigma(n))) \\ Derek Orr, Sep 07 2014
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CROSSREFS
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Cf. Sequences of numbers n such that a(n) = k*sigma(n):
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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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