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A104232
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Triangle read by rows, based on the morphism f: 1->2, 2->3, 3->{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),...
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0
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1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 2, 1, 1, 2, 2, 3, 2, 3, 3, 2, 1, 2, 3, 3, 2, 1, 3, 2, 1, 2, 1, 3, 2, 1, 2, 2, 3, 2, 3, 3, 2, 1, 2, 3, 3, 2, 1, 3, 2, 1, 2, 1, 3, 2, 2, 3, 3, 2, 1, 3, 2, 1, 2, 1, 3, 2, 3, 2, 1, 2, 1, 3, 2, 2, 1, 3, 2, 3, 2, 2, 1, 3, 1, 2, 2, 3, 2, 3, 3, 2, 1, 2, 3, 3, 2, 1, 3, 2, 1, 2, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| This substitution was suggested by looking at the Kenyon border tiling substitutions.
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LINKS
| Richard Kenyon, The Construction of Self-Similar Tilings
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MATHEMATICA
| s[n_] := n /. {1 -> 2, 2 -> 3, 3 -> {2, 1}}; t[a_] := Join[a, Flatten[s /@ a]]; Flatten[ NestList[t, {1}, 6]]
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CROSSREFS
| Cf. A073058.
Sequence in context: A124736 A144016 A179868 * A072086 A180094 A103748
Adjacent sequences: A104229 A104230 A104231 * A104233 A104234 A104235
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KEYWORD
| nonn,tabf
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AUTHOR
| Roger Bagula (rlbagulatftn(AT)yahoo.com), Apr 02 2005
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