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 A354915 #8 Jul 03 2022 09:22:22 %S A354915 53,82,214,321,336,472,541,4477 %N A354915 Maximum length of 3 finite snakes in the Snake Number Problem with n-periodic instructions in an infinite square grid (see Comments). %C A354915 We start with 3 infinite snakes, and 4 possible directions: up, right, down, left. %C A354915 If on its turn one of the snakes cannot execute an order because that square is occupied, it goes to the next order, and so on. %C A354915 The snakes can be blocked and finish there or can continue infinitely. %C A354915 Which are the longest finite snakes using n instructions for 3 snakes that start in the same square (with n >= 4 because with 3 or fewer instructions are infinite)? %H A354915 Ariel Futoransky, <a href="http://snake.puzzlefun.online/">Snake Program</a>, Snake Program to try the snakes, April 2022 (to see more Snakes after the instruction you put :0 :0 for 3 snakes). %H A354915 Rodolfo Kurchan, <a href="http://www.puzzlefun.online/problems">Puzzle Fun</a>, Snake Number Problem, March 2022. %e A354915 | Instructions that give %e A354915 n | Maximum length | the maximal length %e A354915 -------------------------------------------- %e A354915 4 53 URDL %e A354915 5 82 URDLU %e A354915 6 214 UURDUL %e A354915 7 321 URUULDU %e A354915 8 336 URURUULD %e A354915 9 472 URDDDDDDL %e A354915 10 541 UUURUDLLDD %e A354915 11 4477 UUDDRDUUUDL %Y A354915 Cf. A353176, A353234. %K A354915 nonn,more %O A354915 4,1 %A A354915 _Rodolfo Kurchan_, Jun 11 2022