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A075107 Number of steps to reach the first integer (=A075108(n)) starting with n/floor(log_2(n)) and iterating the map x -> x*ceiling(x), or -1 if no integer is ever reached. 3
0, 0, 0, 2, 0, 1, 1, 0, 5, 2, 0, 3, 2, 0, 0, 3, 3, 2, 0, 2, 1, 3, 0, 2, 2, 2, 0, 1, 1, 1, 2, 5, 3, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,4

COMMENTS

Starting values given by A075105(n)/A075106(n).

LINKS

Table of n, a(n) for n=2..35.

EXAMPLE

a(5)=2 since 5/floor(log_2(5)) = 5/2 -> 15/2 -> 60 = A075108(5).

CROSSREFS

Cf. A068119, A073524, A075102, A075120.

Sequence in context: A158800 A144024 A185249 * A269953 A326411 A309163

Adjacent sequences:  A075104 A075105 A075106 * A075108 A075109 A075110

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Sep 02 2002

STATUS

approved

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Last modified August 15 13:20 EDT 2020. Contains 336504 sequences. (Running on oeis4.)