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 A274928 #14 Mar 07 2020 13:50:20 %S A274928 1,3,5,6,7,15,10,17,13,25,14,31,20,33,34,38,35,36,23,41,52,47,53,44, %T A274928 30,54,61,50,51,57,71,78,81,72,79,86,93,74,91,89,98,102,105,56,106,82, %U A274928 97,88,95,87,59,110,68,85,125,84,126,128,116,144,92,127,142 %N A274928 West spoke of spiral in A274640. %H A274928 Alois P. Heinz, <a href="/A274928/b274928.txt">Table of n, a(n) for n = 0..1000</a> %H A274928 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 A274928 Cf. A274640, A274641. The 8 spokes are A274924-A274931. %K A274928 nonn %O A274928 0,2 %A A274928 _N. J. A. Sloane_, Jul 12 2016 %E A274928 More terms from _Alois P. Heinz_, Jul 12 2016