%I #12 Sep 03 2023 14:59:55
%S 11,15,17,5,21,13,7,4,2,1
%N Denominators of a FRACTRAN program that produces the iterates of the Collatz (or 3x+1) function.
%C See A365328 for comments and links.
%H <a href="/index/3#3x1">Index entries for sequences related to 3x+1 (or Collatz) problem</a>
%Y Cf. A014682, A365328 (numerators).
%K nonn,frac,fini,full
%O 1,1
%A _Paolo Xausa_, Sep 01 2023