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A112420 3x+1 chain starting with the number 1117065. 1
1, 3, 1, 8, 2, 1, 3, 1, 5, 2, 1, 4, 2, 6, 3, 1, 4, 2, 7, 3, 1, 5, 1, 8, 4, 1, 6, 1, 9, 2, 1, 4, 2, 6, 3, 9, 4, 1, 6, 3, 1, 5, 1, 7, 2, 1, 3, 1, 5, 2, 7, 3, 1, 5, 1, 8, 4, 1, 6, 1, 9, 2, 1, 7, 3, 1, 9, 4, 2, 6, 3, 1, 5, 2, 1, 3, 1, 5, 2, 8, 4, 1, 6, 1, 9, 2, 1, 4, 2, 6, 3, 1, 8, 2, 1, 3, 1, 5, 2, 1, 4, 2, 7, 3, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The 3x+1 chain starts 1117065 -> 3351196 -> 1675598 -> 837799 and enters a 4->2->1->4->.. cycle after 527 iterations. The current sequence shows the most significant decimal digit after each iteration. [From R. J. Mathar, Jul 26 2010]

LINKS

Table of n, a(n) for n=1..105.

P. Picart, Algorithme de Collatz et conjecture de Syracuse

J. C. Lagarias and K. Soundararajan, Benford's Law for the 3x+1 Function

A. V. Kontorovich & S. J. Miller, Benford's Law, Values Of L-Functions And The 3x+1 Problem

CROSSREFS

Sequence in context: A179393 A217598 A182510 * A010288 A143291 A200064

Adjacent sequences:  A112417 A112418 A112419 * A112421 A112422 A112423

KEYWORD

nonn

AUTHOR

Lekraj Beedassy, Dec 10 2005

STATUS

approved

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Last modified May 19 04:51 EDT 2013. Contains 225428 sequences.