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A106703
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4-symbol substitution from L[n] Coxeter diagram with n=3.
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0
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1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Characteristic Polynomial n=3: x^4-7*x^3+9 These Coxter diagrams behave very much like odd even blocks or branches.
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REFERENCES
| L[n] substitutions of the Coxeter diagram from the McMullen article.
Curtis McMullen, Prym varieties and Teichmuller curves.
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FORMULA
| 1->{3}*n, 2->{3, 4}, 3->{1, 2}, 4->{2}*n.
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MATHEMATICA
| s[1] = Table[If[i <= n, 3, {}], {i, 1, n0}]; s[2] = {3, 4}; s[3] = {1, 2}; s[4] = Table[If[i <= n, 2, {}], {i, 1, n0}]; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[6]
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CROSSREFS
| Sequence in context: A117277 A033831 A033105 * A127267 A008617 A025824
Adjacent sequences: A106700 A106701 A106702 * A106704 A106705 A106706
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KEYWORD
| nonn,uned
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AUTHOR
| Roger L. Bagula (rlbagulatftn(AT)yahoo.com), May 09 2005
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