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A075429 First integer reached when starting with 1+2/(n*(n+1)) and iterating the map x -> x*ceiling(x) A075428(n) times, or -1 if no integer is ever reached. 1
2, 8, 7, 494764640798827359861461484, 2016, 44, 1914, 28763295962709272528037893195870015938157927816600800, 135182360017670059436612452 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
n=5: after A075428(5)=4 steps 1+2/(5*6)=1+1/15=16/15 -> 32/15 -> 32/5 -> 224/5 -> 2016, therefore a(5)=2016.
CROSSREFS
Sequence in context: A303498 A166539 A344718 * A344692 A256166 A021976
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Sep 16 2002
STATUS
approved

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Last modified June 20 03:21 EDT 2024. Contains 373512 sequences. (Running on oeis4.)