Search: id:A132946
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%I A132946
%S A132946 13,20,35,37,39,83,86,221,276,198,303,222,466,368,417,1439,1334,1831,
%T A132946 7841,4710,6486,5900,4853,2240,1237,5039,4903,7927,20253,13404,24127,
%U A132946 46007,43014,259691,607337
%N A132946 Trajectory of 13 under map n -> A132948(n).
%C A132946 13 is the smallest number that does not belong to a cycle with elements 
               <= 260000. Further numbers that do not belong to a cycle with elements 
               <= 260000 and do not occur in the trajectory of a smaller number 
               are 15, 32, 45, 59, 72, 76, 81, 85, 95, ... .
%C A132946 Conjecture: Sequence is not periodic.
%e A132946 a(1) = A132948(13) = 20; a(2) = A132948(20) = 35.
%Y A132946 Cf. A132948, A132949, A132947.
%Y A132946 Sequence in context: A164469 A164462 A164508 this_sequence A066515 A166656 
               A032693
%Y A132946 Adjacent sequences: A132943 A132944 A132945 this_sequence A132947 A132948 
               A132949
%K A132946 nonn,more
%O A132946 0,1
%A A132946 Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Sep 14 2007

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