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Search: id:A105265
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| A105265 |
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Theta(1) substitution isomer: characteristic polynomial x^4-x^3-1=0. |
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1
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| 1, 1, 2, 1, 2, 1, 2, 3, 1, 2, 1, 2, 3, 1, 2, 3, 1, 2, 3, 4, 1, 2, 1, 2, 3, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 1, 2, 1, 2, 3, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 1, 2, 3, 4, 1, 2, 3, 4, 1, 1, 2, 3, 4
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Matrix from digraph: s[1] = {1, 2, 0, 0}; s[2] = {3, 0, 0, 0}; s[3] = {4, 0, 0, 0}; s[4] = {1, 0, 0, 0} M = Table[Table[Count[s[j], i], {i, 1, n0}], {j, 1, n0}] Det[M - x*IdentityMatrix[n0]]
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FORMULA
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1->{1, 2}, 2->{3}, 3->{4}, 4->(1}
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MATHEMATICA
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s[1] = {1, 2}; s[2] = {3}; s[3] = {4}; s[4] = {1}; t[a_] := Join[a, Flatten[s /@ a]]; p[0] = {1}; p[1] = t[{1}]; p[n_] := t[p[n - 1]] aa = p[6]
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CROSSREFS
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Cf. A073058.
Sequence in context: A133780 A080237 A136109 this_sequence A061394 A136314 A121997
Adjacent sequences: A105262 A105263 A105264 this_sequence A105266 A105267 A105268
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KEYWORD
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nonn,uned
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Apr 15 2005
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