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 A106750 #17 Sep 09 2016 08:47:10
%S A106750 2,1,12,121,12112,12112121,1211212112112,121121211211212112121,
%T A106750 1211212112112121121211211212112112,
%U A106750 1211212112112121121211211212112112121121211211212112121
%N A106750 Define the "Fibonacci" morphism f: 1->12, 2->1 and let a(0) = 2; then a(n+1) = f(a(n)).
%C A106750 a(n) converges to the Fibonacci word A003842.
%C A106750 a(n) has length Fibonacci(n+1) (cf. A000045).
%D A106750 Berstel, Jean. "Fibonacci words—a survey." In The book of L, pp. 13-27. Springer Berlin Heidelberg, 1986.
%D A106750 E. Bombieri and J. Taylor, Which distribution of matter diffracts? An initial investigation, in International Workshop on Aperiodic Crystals (Les Houches, 1986), J. de Physique, Colloq. C3, 47 (1986), C3-19 to C3-28.
%H A106750 N. J. A. Sloane, <a href="/A106750/b106750.txt">Table of n, a(n) for n = 0..15</a>
%t A106750 FromDigits /@ NestList[ Flatten[ # /. {1 -> {1, 2}, 2 -> 1}] &, {2}, 8] (* _Robert G. Wilson v_, May 17 2005 *)
%Y A106750 Cf. A106748, A106749, A003842, A000045, A213975, A213976.
%K A106750 nonn
%O A106750 0,1
%A A106750 _N. J. A. Sloane_, May 16 2005. Initial term 2 added by _N. J. A. Sloane_, Jul 05 2012
%E A106750 More terms from _Robert G. Wilson v_, May 17 2005