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%I #20 Jun 19 2017 00:13:41
%S 1,2,3,3,3,21,21,75,75,151,151,1365,1365,5461,5461,14563,14563,87381,
%T 87381,184111,184111,932067,932067,5592405,5592405,13256071,13256071,
%U 26512143,26512143,357913941,357913941,1431655765,1431655765,3817748707
%N Smallest start for a '3x+1' sequence containing 2^n.
%H <a href="/index/3#3x1">Index entries for sequences related to 3x+1 (or Collatz) problem</a>
%F a(n) = A070167(A000079(n)). - _Reinhard Zumkeller_, Jan 02 2013
%o (Haskell)
%o a010120 = a070167 . a000079 -- _Reinhard Zumkeller_, Jan 02 2013
%Y Cf. A054646.
%K nonn,nice
%O 0,2
%A Greg Warrington (waringtn(AT)netcom.com)
%E Corrected and extended by _David W. Wilson_, Jun 15 1997
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