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A138006 Length of all the nontrivial cycles of the Ducci map for n in A138004. 1

%I

%S 3,15,7,341,819,9709,2047,475107,31,3233097,5461,8388607,3556769739,

%T 31675383749,65498251203,575525617597,34359738367,549755813887,

%U 182518930210733,2047,37905296863701641,2251799813685247

%N Length of all the nontrivial cycles of the Ducci map for n in A138004.

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

%Y Cf. A135546.

%K nonn

%O 1,1

%A _T. D. Noe_, Feb 26 2008

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Last modified August 24 16:59 EDT 2019. Contains 326295 sequences. (Running on oeis4.)