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 A274619 #8 Mar 07 2020 13:50:20 %S A274619 5,0,1,4,3,6,2,8,9,10,11,7,13,12,15,16,17,18,14,20,19,22,21,24,25,26, %T A274619 27,23,29,28,31,32,33,34,30,36,35,38,37,40,41,42,43,39,45,44,47,48,49, %U A274619 50,46,52,51,54,53,56,57,58,59,55,61,60,63,64,65,66,62,68,67,70,69,72,73,74,75,71,77,76,79 %N A274619 Fourth column of A274528. %H A274619 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 A274619 Cf. A274528. Adding 1 gives A274617. %K A274619 nonn %O A274619 0,1 %A A274619 _N. J. A. Sloane_, Jul 01 2016