id:A075108 - OEIS Search Results

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First integer reached when starting with n/floor(Log2(n)) and iterating the map x -> x*ceiling(x) A075107(n) times, or -1 if no integer is ever reached.

+0
3

2, 3, 2, 60, 3, 14, 8, 3, 1484710602474311520, 220, 4, 227370, 560, 5, 4, 218790, 268065, 570, 5, 1008, 33, 1458660, 6, 1925, 2093, 2268, 7, 58, 60, 62, 2016, 494764640798827359861461484, 5220768, 7 (list; graph; listen)

	OFFSET	`2,1`
	EXAMPLE	`n=5: after A075107(5)=2 steps 5/floor(Log2(5))=5/2 -> 15/2 -> 60, therefore a(5)=60.`
	CROSSREFS	`Cf. A075103, A075121.` `Sequence in context: A025522 A019228 A075121 this_sequence A026932 A087401 A127572` `Adjacent sequences: A075105 A075106 A075107 this_sequence A075109 A075110 A075111`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 02 2002`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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