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Analog of A006684 for the 5x+1 problem (cf. A133419).
3

%I #9 Jul 10 2015 19:57:44

%S 1,5,17,23,41,53,65,71,77,95,221,317,365,383,3317,3575,3605,6473,

%T 24125,31901,39965,44183,163733,317885,490541,519113,558365,602591,

%U 707735,753023,1019615,1463897,1597973,1752575,4595735,6197855

%N Analog of A006684 for the 5x+1 problem (cf. A133419).

%C The 5x+1 map sends x to x/2 if x is even, x/3 if x is divisible by 3, otherwise 5x+1.

%H N. J. A. Sloane, <a href="/A133423/b133423.txt">Table of n, a(n) for n=1..89</a> (from the web page of Tomás Oliveira e Silva)

%H Tomás Oliveira e Silva, <a href="http://sweet.ua.pt/tos/3x+1.html">The px+1 problem</a>

%H <a href="/index/3#3x1">Index entries for sequences related to 3x+1 (or Collatz) problem</a>

%Y Cf. A133419, A133424, A133419, ...

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Nov 27 2007