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Search: id:A049000
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| A049000 |
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Sum of sigma(j) for 1<=j<10^n, where sigma(j) is the sum of divisors of j. |
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+0
4
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| 0, 69, 8082, 820741, 82231803, 8224494757, 822465638000, 82246686892516, 8224670172682646, 822467031614802290, 82246703327412473943
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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The ratio of successive terms approaches 100.
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EXAMPLE
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For n=1, the sum of sigma(j) for j<10 is 1+3+4+7+6+12+8+15+13=69, so a(1)=69.
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CROSSREFS
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Cf. A000203.
Cf. A072692 (sum for 1<=j<=10^n and other links).
Sequence in context: A017785 A017732 A114028 this_sequence A116099 A116238 A136114
Adjacent sequences: A048997 A048998 A048999 this_sequence A049001 A049002 A049003
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KEYWORD
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nonn
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AUTHOR
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Enoch Haga and Jud McCranie (Enokh(AT)comcast.net and j.mccranie(AT)comcast.net)
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EXTENSIONS
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One more term from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jul 03 2002
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