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A271498 Smallest number in the trajectory of n under repeated application of the map k -> A271497(k). 3
1, 1, 1, 1, 1, 1, 7, 1, 1, 1, 7, 1, 7, 7, 1, 1, 1, 1, 7, 1, 7, 7, 1, 1, 7, 7, 1, 7, 1, 1, 31, 7, 7, 1, 7, 1, 7, 7, 7, 1, 7, 7, 7, 7, 1, 7, 31, 1, 7, 7, 1, 7, 7, 1, 31, 7, 7, 7, 31, 1, 31, 31, 7, 7, 7, 7, 7, 7, 1, 7, 1, 1, 7, 7, 7, 7, 1, 7, 31, 7, 1, 7, 1, 7, 1, 1, 1, 7, 1, 1, 31, 1, 31, 31, 7, 7, 7, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

COMMENTS

It appears that every number n eventually reaches one of the loops (1,2,3), (7,14,21), (31,62,96), ..., (2^(2m)-1, 2^(2m+1)-2, 3(2^(2m)-1))), ...

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000

CROSSREFS

Cf. A271497,

Sequence in context: A088840 A344696 A336457 * A317940 A318674 A284118

Adjacent sequences:  A271495 A271496 A271497 * A271499 A271500 A271501

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Apr 16 2016

STATUS

approved

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Last modified September 23 00:32 EDT 2021. Contains 347609 sequences. (Running on oeis4.)