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Search: id:A106797
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| A106797 |
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4-symbol substitution 1d Pisot characteristic polynomial: x^4-4*x^3-6*x^2-x-1. |
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+0
1
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| 1, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 3, 4, 1, 4, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 3, 4, 1, 4, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 3, 4, 1, 4, 1, 2
(list; graph; listen)
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OFFSET
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0,5
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REFERENCES
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Pure Discrete Spectrum for One Dimensional Substitution Systems of Pisot Type, V. F. Sirvent and B. Solomyak, page 15, example 4
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FORMULA
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1->{1, 1, 1, 1, 2, 2, 3}, 2->{4, 1}, 3->{2, 1, 1, 1}, 4->{1, 2, 1}
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MATHEMATICA
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s[1] = {1, 1, 1, 1, 2, 2, 3}; s[2] = {4, 1}; s[3] = {2, 1, 1, 1}; s[4] = {1, 2, 1}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[3]
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CROSSREFS
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Cf. A106749.
Sequence in context: A071473 A084189 A084352 this_sequence A074313 A066422 A092779
Adjacent sequences: A106794 A106795 A106796 this_sequence A106798 A106799 A106800
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KEYWORD
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nonn,uned
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), May 17 2005
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