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Records for the length of the preperiodic part of the 'Reverse and Subtract' trajectories.
2

%I #8 Jul 11 2015 00:37:27

%S 0,1,2,6,7,12,13,18,25,40,45,47,48,49,55,56,60,62,63,64,66,71,72,75,

%T 78,81,106,108,111,112,114,115,119,121,122,130,132,133,135,147,148,

%U 149,151,156

%N Records for the length of the preperiodic part of the 'Reverse and Subtract' trajectories.

%C Successive maxima in sequence A072137. A072146 gives the corresponding starting points. - This sequence is a weak analog of A065199, which uses 'Reverse and Add'.

%e 6 is a record, since the preperiodic part of the trajectory of 13 has length 6 and for k < 13 the preperiodic part has a smaller length (at most 2).

%Y Cf. A072137, A072146, A065199.

%K base,more,nonn

%O 1,3

%A _Klaus Brockhaus_, Jun 24 2002

%E a(18) inserted, a(25) corrected, a(29) through a(44) added by Alexander Pesch (alex-physics(AT)gmx.net), May 29 2007

%E Edited by _N. J. A. Sloane_, Dec 01 2007