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A138006 Length of all the nontrivial cycles of the Ducci map for n in A138004. 1
3, 15, 7, 341, 819, 9709, 2047, 475107, 31, 3233097, 5461, 8388607, 3556769739, 31675383749, 65498251203, 575525617597, 34359738367, 549755813887, 182518930210733, 2047, 37905296863701641, 2251799813685247 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

It appears that the maximum possible cycle length is n*(2^((n-1)/2)-1).

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Cf. A135546.

Sequence in context: A102777 A102531 A135546 * A256557 A145179 A297897

Adjacent sequences:  A138003 A138004 A138005 * A138007 A138008 A138009

KEYWORD

nonn

AUTHOR

T. D. Noe, Feb 26 2008

STATUS

approved

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Last modified July 18 10:35 EDT 2019. Contains 325138 sequences. (Running on oeis4.)