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 A376688 #10 Oct 03 2024 11:03:25 %S A376688 1,2,11,22,121,212,1221,2112,11211,22122,121121,212212,1221221, %T A376688 2112112,12122121,21211212,112212211,221121122,1121221211,2212112122, %U A376688 12211211221,21122122112,122121121221,211212212112,1211221221121,2122112112212,11221211212211 %N A376688 List of palindromic subwords (or palindromic factors) of the Kolakoski sequence (A000002). %C A376688 Empirically, for any m > 0, there are two m-digit terms, say w1 and w2, and replacing 1's by 2's and 2's by 1's in w1 yields w2. %H A376688 Rémy Sigrist, <a href="/A376688/b376688.txt">Table of n, a(n) for n = 1..200</a> %H A376688 Rémy Sigrist, <a href="/A376688/a376688.png">Representation of the 1's among the first 1000 terms starting with a digit 1</a> %H A376688 Rémy Sigrist, <a href="/A376688/a376688.gp.txt">PARI program</a> %H A376688 <a href="/index/K#Kolakoski">Index entries for sequences related to Kolakoski sequence</a> %o A376688 (PARI) \\ See Links section. %Y A376688 Intersection of A002113 and A376677. %Y A376688 Cf. A000002, A307095. %K A376688 nonn,base %O A376688 1,2 %A A376688 _Rémy Sigrist_, Oct 01 2024