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Search: id:A110757
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| A110757 |
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tau(N), where N = reverse concatenation 1,2,3,...upto n. |
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+0
5
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| 1, 4, 4, 4, 8, 4, 4, 12, 18, 8, 4, 8, 8, 16, 48, 16, 96, 576, 16, 32, 16, 32, 16, 32, 64, 256, 96, 32, 128, 256, 8, 64, 32, 128, 384, 144, 16, 8, 64, 32, 256, 64, 8, 192, 96
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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a(3) = tau(321) = 4.
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MATHEMATICA
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s = ""; Do[s = ToString[n] <> s; Print[DivisorSigma[0, ToExpression[s]]], {n, 1, 45}] (Propper)
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CROSSREFS
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Cf. A110756, A110758, A110759, A110760.
Sequence in context: A128939 A105352 A132200 this_sequence A085071 A011412 A065734
Adjacent sequences: A110754 A110755 A110756 this_sequence A110758 A110759 A110760
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 11 2005
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EXTENSIONS
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More terms from Ryan Propper (rpropper(AT)stanford.edu), Sep 23 2005
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