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 A343838 #5 Feb 16 2025 08:34:02 %S A343838 1,11,13,1431,143111413111,14311141311241311341113113, %T A343838 14311141311241311341113114413113411131122141113112314113311231 %N A343838 Describe all the previous terms (previous terms are concatenated into one large integer; method - digit-indication followed by frequency, initial term is 1). %C A343838 The next term is too large to include. %H A343838 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LookandSaySequence.html">Look and Say Sequence</a> %e A343838 a(4) is obtained by saying "1 four times, 3 once", which gives 1431. %Y A343838 Cf. A005150, A007651, A045981, A045982, A060857, A343837. %K A343838 nonn,base,easy %O A343838 1,2 %A A343838 _Ilya Gutkovskiy_, May 01 2021