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A076753
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a(n) = nearest integer to the standard deviation of the divisors of n.
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1
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0, 1, 1, 2, 3, 2, 4, 3, 4, 4, 7, 4, 8, 6, 6, 6, 11, 6, 13, 7, 9, 10, 16, 8, 13, 12, 12, 10, 20, 10, 21, 12, 15, 16, 16, 11, 25, 17, 17, 13, 28, 14, 30, 17, 16, 21, 33, 14, 26, 19, 23, 20, 37, 18, 25, 19, 26, 27, 41, 17, 42, 29, 23, 23, 30, 22, 47, 26, 32, 24, 49, 20, 51, 35, 28, 29
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OFFSET
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1,4
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LINKS
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EXAMPLE
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The standard deviation of the divisors {1, 2, 3, 6} of 6 is approximately 2.16025, so that a(6) = 2.
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MATHEMATICA
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Flatten[Append[{0}, Table[Round[StandardDeviation[Divisors[n]]], {n, 2, 100}]]]
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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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