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 A343385 #7 Apr 26 2021 21:34:48 %S A343385 1,10,29,2,5,40,7,4,11,26,83,174,123,84,27,12,15,18,35,64,97,36,65, %T A343385 142,63,66,149,102,143,146,103,100,141,62,33,58,55,28,87,178,131,92, %U A343385 31,54,13,60,139,248,191,316,247,136,91,182,185,132,237,300,371,450,295,228,173,82,49,78,45,74 %N A343385 The ordered square spiral numbers visited by the knight in A343356. %C A343385 This is the ordered square-spiral numbers visited by a knight on a square spiral as numbered in A343356. See that sequence for further details. %H A343385 Scott R. Shannon, <a href="/A343385/a343385.png">Image showing the 370 visited squares</a>. The spiral is numbered with the ordered spiral numbers. The starting square is highlighted in white, the visited squares in yellow, the path is colored across the spectrum to show the relative step ordering, and the final square is highlighted in red. %Y A343385 Cf. A343356, A316667, A323714, A323808, A329519, A329520, A335844. %K A343385 nonn,fini %O A343385 1,2 %A A343385 _Scott R. Shannon_, Apr 13 2021