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A176187 Least period of sequence {f^(m)(n)},m=1,2,3,..., where f^(m) is the m-th iteration of A002326 (f^(1)=f), after possibly dropping some finite number of iterations 1
1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 3, 3, 1, 1, 1, 3, 1, 1, 3, 1, 1, 3, 1, 1, 1, 3, 1, 3, 1, 1, 3, 1, 1, 3, 1, 3, 1, 3, 1, 1, 3, 1, 1, 1, 3, 1, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 3, 3, 1, 3, 1, 3, 1, 3, 3, 1, 3, 1, 3, 3, 1, 1, 1, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,10

COMMENTS

Conjecture: For every n>=0 the sequence {f^(m)(n)} is eventually periodic. Further calculations may show if there exist terms different from 1 and 3.

LINKS

Table of n, a(n) for n=0..76.

EXAMPLE

For n=0, we have: f(0)=1, f(1)=2, f(2)=4, f(4)=6, f(6)=12, f(12)=20, f(20)=20,... Thus a(1)=1.

CROSSREFS

Cf. A002326

Sequence in context: A308166 A295931 A295920 * A180683 A214635 A166030

Adjacent sequences:  A176184 A176185 A176186 * A176188 A176189 A176190

KEYWORD

nonn

AUTHOR

Vladimir Shevelev, Apr 11 2010, Apr 20 2010

STATUS

approved

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Last modified January 18 14:40 EST 2022. Contains 350455 sequences. (Running on oeis4.)