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 A106749 #9 Oct 02 2016 10:02:59
%S A106749 1,1,3,1,1,3,2,1,1,3,1,1,3,2,1,3,1,1,3,1,1,3,2,1,1,3,1,1,3,2,1,3,1,1,
%T A106749 3,2,1,1,3,1,1,3,2,1,1,3,1,1,3,2,1,3,1,1,3,1,1,3,2,1,1,3,1,1,3,2,1,3,
%U A106749 1,1,3,2,1,1,3,1,1,3,2,1,3,1,1,3,1,1,3,2,1,1,3,1,1,3,2,1,3,1,1,3,1,1,3,2,1
%N A106749 Define the morphism f: 1->113, 2->13, 3->2; sequence gives trajectory of 1 under f.
%D A106749 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 A106749 <a href="/index/Fi#FIXEDPOINTS">Index entries for sequences that are fixed points of mappings</a>
%t A106749 Nest[ Flatten[ # /. {1 -> {1, 1, 3}, 2 -> {1, 3}, 3 -> 2}] &, {1}, 6] (* _Robert G. Wilson v_, May 17 2005 *)
%Y A106749 Cf. A106748.
%K A106749 nonn,easy
%O A106749 0,3
%A A106749 _N. J. A. Sloane_, May 16 2005
%E A106749 More terms from _Robert G. Wilson v_, May 17 2005