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 A036579 #8 Jul 08 2025 21:45:38 %S A036579 1,2,0,1,0,2,1,2,0,2,1,0,1,2,0,1,0,2,1,0,1,2,0,2,1,2,0,1,0,2,1,2,0,2, %T A036579 1,0,1,2,0,2,1,2,0,1,0,2,1,0,1,2,0,1,0,2,1,2,0,2,1,0,1,2,0,1,0,2,1,0, %U A036579 1,2,0,2,1,2,0,1,0,2,1,0,1,2,0,1,0,2,1,2,0,2,1,0,1,2,0,2,1,2,0 %N A036579 Ternary Thue-Morse sequence: closed under a->abc, b->ac, c->b. %D A036579 M. Lothaire, Combinatorics on Words. Addison-Wesley, Reading, MA, 1983, p. 26. %H A036579 A. Cobham, <a href="http://dx.doi.org/10.1007/BF01706087">Uniform Tag Sequences</a>, Mathematical Systems Theory, 6 (1972), 164-192. %Y A036579 Cf. A036582. %K A036579 nonn %O A036579 0,2 %A A036579 _N. J. A. Sloane_