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 A106797 4-symbol substitution 1d Pisot characteristic polynomial: x^4-4*x^3-6*x^2-x-1. 0
 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; refs; listen; history; text; internal format)
 OFFSET 0,5 REFERENCES Pure Discrete Spectrum for One Dimensional Substitution Systems of Pisot Type, V. F. Sirvent and B. Solomyak, page 15, example 4 LINKS FORMULA 1->{1, 1, 1, 1, 2, 2, 3}, 2->{4, 1}, 3->{2, 1, 1, 1}, 4->{1, 2, 1} MATHEMATICA 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] CROSSREFS Cf. A106749. Sequence in context: A071473 A084189 A084352 * A308746 A074313 A303506 Adjacent sequences:  A106794 A106795 A106796 * A106798 A106799 A106800 KEYWORD nonn,uned AUTHOR Roger L. Bagula, May 17 2005 STATUS approved

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Last modified October 17 01:03 EDT 2019. Contains 328103 sequences. (Running on oeis4.)