cp's OEIS Frontend

A362956 a(n) is the y-coordinate of the n-th point in a square spiral mapped to a square grid rotated by Pi/4 using the distance-limited strip bijection described in A307110.

%I A362956 #10 May 10 2023 09:47:33
%S A362956 0,0,1,1,0,0,-1,-1,0,1,1,2,3,2,2,1,0,-1,-1,-2,-3,-2,-2,-1,0,1,1,2,3,3,
%T A362956 4,4,3,2,2,1,0,-1,-1,-2,-3,-3,-4,-4,-3,-2,-2,-1,0,1,2,2,3,4,4,5,6,5,4,
%U A362956 3,3,2,1,1,0,-1,-2,-2,-3,-4,-4,-5,-6,-5,-4,-3,-3,-2,-1,-1,0,0
%N A362956 a(n) is the y-coordinate of the n-th point in a square spiral mapped to a square grid rotated by Pi/4 using the distance-limited strip bijection described in A307110.
%H A362956 Hugo Pfoertner, <a href="/A362956/b362956.txt">Table of n, a(n) for n = 0..3000</a>
%H A362956 Hugo Pfoertner, <a href="https://oeis.org/plot2a?name1=A362955&amp;name2=A362956&amp;tform1=untransformed&amp;tform2=untransformed&amp;shift=0&amp;radiop1=xy&amp;drawlines=true">Plot of mapped spiral</a>, using Plot 2.
%o A362956 (PARI) \\ for functions ax, ay, p see A362955
%o A362956 for (k=0, 81, print1 (p(ax(k),ay(k))[2]", "))
%Y A362956 A362955 gives the corresponding x-coordinates.
%Y A362956 Cf. A174344, A274923, A307110, A307731.
%K A362956 sign
%O A362956 0,12
%A A362956 _Hugo Pfoertner_, May 10 2023