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%I #9 Apr 27 2020 23:58:46
%S 0,0,0,0,1,1,2,2,2,2,1,1,0,0,0,0,1,1,2,2,3,3,3,3,4,4,4,4,5,5,6,6,6,6,
%T 5,5,4,4,4,4,3,3,3,3,2,2,1,1,0,0,0,0,1,1,2,2,2,2,1,1,0,0,0,0,1,1,2,2,
%U 3,3,3,3,4,4,4,4,5,5,6,6,7,7,7,7,6,6,5
%N a(n) is the X-coordinate of the point at n steps backward from the origine along the H-order curve defined in A334232; sequence A334236 gives Y-coordinates.
%H Rémy Sigrist, <a href="/A334235/b334235.txt">Table of n, a(n) for n = 0..8192</a>
%H Rémy Sigrist, <a href="/A334235/a334235.gp.txt">PARI program for A334235</a>
%H <a href="/index/Con#coordinates_2D_curves">Index entries for sequences related to coordinates of 2D curves</a>
%F A334232(A334236(n), a(n)) = -n.
%e The "backward" branch of H-order curve starting from the origin is as follows:
%e 7| -15..-16 -19..-20 -27..-28 -31
%e | | | | | | | |
%e 6| -14 -17..-18 -21 -26 -29..-30
%e | | | |
%e 5| -13 -10...-9 -22 -25
%e | | | | | |
%e 4| -12..-11 -8 -23..-24
%e | |
%e 3| -3...-4 -7
%e | | | |
%e 2| -2 -5...-6
%e | |
%e 1| -1
%e | |
%e 0| 0
%e ---+----------------------------------------
%e y/x| 0 1 2 3 4 5 6 7
%e - hence a(24) = a(25) = a(26) = a(27) = 4.
%o (PARI) See Links section.
%Y Cf. A334232, A334236.
%K nonn
%O 0,7
%A _Rémy Sigrist_, Apr 20 2020
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