This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A342562 #20 Mar 03 2024 17:18:00 %S A342562 0,0,0,1,0,-1,0,0,1,0,-1,1,1,-1,-1,0,1,0,-1,1,1,-1,-1,1,1,-1,-1,0,0,2, %T A342562 0,-2,0,0,1,0,-1,0,2,0,-2,1,2,2,1,-1,-2,-2,-1,0,2,0,-2,0,1,0,-1,1,1, %U A342562 -1,-1,1,2,2,1,-1,-2,-2,-1,1,2,2,1,-1,-2,-2,-1,1,1,-1,-1,0,2,0,-2,2,2,-2,-2,0,2,0,-2 %N A342562 List points (x,y,z) having integer coordinates, sorted first by R=x^2+y^2+z^2 and in case of ties, then by z and last by polar angle 0 <= phi < 2*Pi in a polar coordinate system. Sequence gives y-coordinates. %H A342562 Hugo Pfoertner, <a href="/A342562/b342562.txt">Table of n, a(n) for n = 0..10130</a> %e A342562 See A342561. %o A342562 (PARI) A342562_vec=concat([[P[2] | P<-shell(n)] | n<-[0..7]]) \\ See A342561 for shell(). - _M. F. Hasler_, Apr 27 2021 %Y A342562 Cf. A305575, A305576, A342561 (x-coordinates), A342563 (z-coordinates). %K A342562 sign,look %O A342562 0,30 %A A342562 _Hugo Pfoertner_, Apr 27 2021