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Search: id:A106654
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| A106654 |
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Four-symbol substitution, characteristic polynomial: x^4-x^2-x-1. |
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+0
1
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| 4, 1, 2, 3, 2, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 4, 1, 2, 3, 2, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 4, 1, 2, 3, 2, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 4, 1, 2
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Digraph matrix is: M={{0, 1, 0, 0}, {0, 0, 1, 0}, {0, 0, 0, 1}, {1, 1, 1, 0}}
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FORMULA
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1->{2}, 2->{3}, 3->{4}, 5->{1, 2, 3}
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MATHEMATICA
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s[1] = {2}; s[2] = {3}; s[3] = {4}; s[4] = {1, 2, 3}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[15]
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CROSSREFS
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Sequence in context: A010473 A131100 A064124 this_sequence A090204 A156915 A072046
Adjacent sequences: A106651 A106652 A106653 this_sequence A106655 A106656 A106657
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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 12 2005
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