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A129759
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For the Landau function L(n), A000793, this sequence gives the largest prime which is a factor of L(n).
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1, 2, 3, 2, 3, 3, 3, 5, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 11, 11, 7, 11, 11, 13, 13, 11, 11, 11, 11, 13, 13, 11, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 17, 17, 17, 17, 17, 19, 19, 17, 17, 7, 17, 19, 19, 17, 17, 19, 19, 19, 19, 19, 19, 17, 19
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| This function is not monotone increasing, for example a(33) = 13 while a(34) = 11.
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FORMULA
| a(n) = A006530[A000793(n)]. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 17 2007
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EXAMPLE
| L(29) = 2520, whose largest prime factor is 7. So a(29) = 7.
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CROSSREFS
| Cf. A000793, A128305.
Sequence in context: A083060 A102351 A078173 * A137467 A078627 A106370
Adjacent sequences: A129756 A129757 A129758 * A129760 A129761 A129762
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KEYWORD
| nonn
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AUTHOR
| Anthony C Robin (anthony_robin(AT)hotmail.com), May 15 2007
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EXTENSIONS
| More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de) and R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 16 2007
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