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 A307483 #10 Apr 14 2019 16:47:28 %S A307483 0,0,1,1,1,0,-1,-1,-1,0,0,0,1,2,2,3,4,4,4,5,5,5,4,3,3,3,4,4,4,3,2,2,1, %T A307483 0,0,0,-1,-2,-2,-3,-4,-4,-4,-3,-3,-3,-4,-5,-5,-5,-4,-4,-4,-3,-2,-2,-1, %U A307483 0,0,0,1,1,1,0,-1,-1,-1,0,0,0,1,2,2,3,4,4,4,5,6,6 %N A307483 Second coordinate, divided by 2, of path in rotated lattice corresponding to A307446 and A307447. A307482 gives first coordinate. %C A307483 For a description of the construction and visualizations see A307446. %H A307483 Hugo Pfoertner, <a href="/A307483/b307483.txt">Table of n, a(n) for n = 1..10000</a> %H A307483 Hugo Pfoertner, <a href="/A307483/a307483.png">Visualization of path</a>. %Y A307483 Cf. A307446, A307447, A307482. %K A307483 sign %O A307483 1,14 %A A307483 _Hugo Pfoertner_, Apr 10 2019