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Search: id:A100384
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| A100384 |
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a(n) = the smallest number x such that for m=x to x+n-1, A006530(m) increases. |
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4
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| 2, 2, 8, 8, 90, 168, 9352, 46189, 721970, 721970, 6449639, 565062156, 11336460025, 37151747513, 256994754033
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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A006530(m) is the largest prime factor of m.
a(16) > 3*10^11. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Oct 24 2009]
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EXAMPLE
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a(5)=90 because the largest prime factors of 90,91,92,93,94 are 5,13,23,31,47.
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CROSSREFS
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Cf. A006530, A070089, A071869, A100376, A100385.
Sequence in context: A016119 A037223 A066988 this_sequence A000023 A010584 A131659
Adjacent sequences: A100381 A100382 A100383 this_sequence A100385 A100386 A100387
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KEYWORD
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nonn,more
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Dec 09 2004
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EXTENSIONS
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Edited by Don Reble (djr(AT)nk.ca), Jun 13 2007
a(13)-a(15) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Oct 24 2009
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