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%I #15 Sep 26 2019 11:03:13
%S 0,2,1,-1,1,0,-1,1,-1,0,2,1,3,2,0,2,3,1,-1,-2,0,-2,-3,-2,-1,-3,-2,-1,
%T 1,3,4,3,1,-1,-3,-4,-2,-3,-2,0,2,3,2,0,-2,-3,-4,-5,-3,-1,1,3,4,5,4,2,
%U 0,-2,-4,-5,-6,-4,-5,-3,-4,-2,-3,-4,-2,0,2,4,5,4,3
%N The x-coordinates of squares visited by knight moves on a spirally numbered board and moving to the lowest available unvisited square at each step.
%H Peter Kagey, <a href="/A324606/b324606.txt">Table of n, a(n) for n = 1..2016</a>
%H N. J. A. Sloane and Brady Haran, <a href="https://www.youtube.com/watch?v=RGQe8waGJ4w">The Trapped Knight</a>, Numberphile video (2019)
%H Visualization of walk using <a href="https://oeis.org/plot2a?name1=A324606&name2=A324607&shift=0&radiop1=xy&drawlines=true">Plot 2</a>. - _Peter Kagey_, Jul 15 2019
%F a(n) = A174344(A316667(n)).
%Y Cf. A174344, A316667.
%Y A324607 gives y-coordinates.
%K sign,fini,full,walk
%O 1,2
%A _Peter Kagey_, Jun 06 2019