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 A036583 #7 Jul 08 2025 21:45:59 %S A036583 1,3,2,1,2,3,1,3,2,3,1,2,1,3,2,1,2,3,1,2,1,3,2,3,1,3,2,1,2,3,1,3,2,3, %T A036583 1,2,1,3,2,3,1,3,2,1,2,3,1,2,1,3,2,1,2,3,1,3,2,3,1,2,1,3,2,1,2,3,1,2, %U A036583 1,3,2,3,1,3,2,1,2,3,1,2,1,3,2,1,2,3,1,3,2,3,1,2,1,3,2,3,1,3,2 %N A036583 Ternary Thue-Morse sequence: closed under a->abc, b->ac, c->b. %D A036583 M. Lothaire, Combinatorics on Words. Addison-Wesley, Reading, MA, 1983, p. 26. %Y A036583 Equals A036581(n) + 1. %K A036583 nonn %O A036583 0,2 %A A036583 _N. J. A. Sloane_