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%I #14 May 15 2018 16:44:23
%S 1,2,2,3,3,3,3,3,3,5,5,5,5,5,5,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,12,12,15,
%T 15,15,15,15,15,19,19,20,20,20,20,20,20,20,23,23,23,23,23,23,23,23,27,
%U 27,27,27,27,27,27,27,27,27
%N A251546(n)/2.
%H Chai Wah Wu, <a href="/A251547/b251547.txt">Table of n, a(n) for n = 1..10000</a>
%H David L. Applegate, Hans Havermann, Bob Selcoe, Vladimir Shevelev, N. J. A. Sloane, and Reinhard Zumkeller, <a href="http://arxiv.org/abs/1501.01669">The Yellowstone Permutation</a>, arXiv preprint arXiv:1501.01669, 2015 and <a href="https://cs.uwaterloo.ca/journals/JIS/VOL18/Sloane/sloane9.html">J. Int. Seq. 18 (2015) 15.6.7</a>.
%o (Haskell)
%o a251547 = flip div 2 . a251546 -- _Reinhard Zumkeller_, Dec 19 2014
%Y Cf. A098550, A247253, A251416, A251417, A251546-A251552.
%K nonn
%O 1,2
%A _N. J. A. Sloane_, Dec 18 2014
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