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 A105112 Triangle read by rows, based on the morphism f: 1->2, 2->3, 3->{3,5,5,4}, 4->5, 5->6, 6->{6,2,2,1}. First row is 1. If current row is a,b,c,..., then the next row is a,b,c,...,f(a),f(b),f(c),... 1

%I

%S 1,1,2,1,2,2,3,1,2,2,3,2,3,3,3,5,5,4,1,2,2,3,2,3,3,3,5,5,4,2,3,3,3,5,

%T 5,4,3,3,5,5,4,3,5,5,4,3,5,5,4,6,6,5,1,2,2,3,2,3,3,3,5,5,4,2,3,3,3,5,

%U 5,4,3,3,5,5,4,3,5,5,4,3,5,5,4,6,6,5,2,3,3,3,5,5,4,3,3,5,5,4,3,5,5,4,3,5,5

%N Triangle read by rows, based on the morphism f: 1->2, 2->3, 3->{3,5,5,4}, 4->5, 5->6, 6->{6,2,2,1}. First row is 1. If current row is a,b,c,..., then the next row is a,b,c,...,f(a),f(b),f(c),...

%C Improved version of bi-Kenyon 6-symbol substitution.

%H Richard Kenyon, <a href="http://arXiv.org/abs/math.MG/9505210">The Construction of Self-Similar Tilings</a>

%t s[n_] := n /. {1 -> 2, 2 -> 3, 3 -> {3, 5, 5, 4}, 4 -> 5, 5 -> 6, 6 -> {6, 2, 2, 1}}; t[a_] := Join[a, Flatten[s /@ a]]; Flatten[ NestList[t, {1}, 5]]

%Y Cf. A103684.

%K nonn,tabf

%O 0,3

%A _Roger L. Bagula_, Apr 07 2005

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Last modified March 28 05:13 EDT 2020. Contains 333073 sequences. (Running on oeis4.)