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 A351043 #22 Jan 31 2025 04:29:56 %S A351043 0,1,9,24,46,45,21,6,4,15,33,32,12,11,10,8,7,5,16,36,63,97,96,60,13, %T A351043 27,50,80,119,165,164,116,75,41,68,66,64,99,141,140,138,93,55,86,84, %U A351043 49,79,78,76,43,69,104,102,100,143,193,192,190,137,57,54,52,25 %N A351043 Lexicographically earliest non-extendable Racetrack trajectory (using von Neumann neighborhood) on spiral on infinite square grid. %C A351043 The car starts at square 0 and thereafter moves, according to the rules of Racetrack with von Neumann neighborhood (see A351042), to the lowest numbered unvisited square. The spiral numbering is described in A316328. After 146 steps, the car cannot move to any unvisited square, so the sequence is finite with 147 terms. %C A351043 The position of the car after n steps is (A174344(a(n)+1), A274923(a(n)+1)). - _Pontus von Brömssen_, Jan 30 2025 %H A351043 Pontus von Brömssen, <a href="/A351043/b351043.txt">Table of n, a(n) for n = 0..146</a> %H A351043 Pontus von Brömssen, <a href="/A351043/a351043.svg">Trajectory of the Racetrack car in A351043</a>. %H A351043 Wikipedia, <a href="https://en.wikipedia.org/wiki/Racetrack_(game)">Racetrack</a> %Y A351043 Cf. A174344, A274923, A316328, A351042. %K A351043 nonn,fini,full %O A351043 0,3 %A A351043 _Pontus von Brömssen_, Jan 30 2022