id:A075428 - OEIS Search Results

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Number of steps to reach the first integer (=A075429(n)) starting with 1+2/(n*(n+1)) and iterating the map x -> x*ceiling(x), or -1 if no integer is ever reached.

+0
2

0, 2, 2, 7, 4, 3, 4, 8, 7 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(5)=4 since 1+2/(5*6)=1+1/15=16/15 -> 32/15 -> 32/5 -> 224/5 -> 2016=A075429(5).`
	CROSSREFS	`Cf. A073524, A000217.` `Sequence in context: A077218 A102780 A115025 this_sequence A116077 A074144 A011146` `Adjacent sequences: A075425 A075426 A075427 this_sequence A075429 A075430 A075431`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 16 2002`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

AT&T Labs Research