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 A274927 #17 Mar 07 2020 13:50:20 %S A274927 1,2,3,4,8,9,7,11,14,10,22,29,18,19,25,26,20,30,33,28,31,32,45,67,41, %T A274927 34,38,44,48,51,49,100,55,52,58,53,60,61,64,63,121,75,70,65,71,72,83, %U A274927 81,74,79,84,82,86,88,85,87,176,95,96,93,106,103,109,112,105 %N A274927 Northwest spoke of spiral in A274640. %H A274927 Alois P. Heinz, <a href="/A274927/b274927.txt">Table of n, a(n) for n = 0..1000</a> %H A274927 F. Michel Dekking, Jeffrey Shallit, and N. J. A. Sloane, <a href="https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i1p52/8039">Queens in exile: non-attacking queens on infinite chess boards</a>, Electronic J. Combin., 27:1 (2020), #P1.52. %Y A274927 Cf. A274640, A274641. The 8 spokes are A274924-A274931. %K A274927 nonn %O A274927 0,2 %A A274927 _N. J. A. Sloane_, Jul 12 2016 %E A274927 More terms from _Alois P. Heinz_, Jul 12 2016