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 A106796 4-symbol substitution 1d Pisot characteristic polynomial: x^4-2*x^2-x-1. 0
 1, 1, 2, 1, 1, 2, 3, 1, 1, 2, 1, 1, 2, 3, 1, 4, 1, 1, 2, 1, 1, 2, 3, 1, 1, 2, 1, 1, 2, 3, 1, 4, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 3, 1, 1, 2, 1, 1, 2, 3, 1, 4, 1, 1, 2, 1, 1, 2, 3, 1, 1, 2, 1, 1, 2, 3, 1, 4, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 3, 1, 1, 2, 1, 1, 2, 1, 1, 2, 3, 1, 1, 2, 1, 1, 2, 3, 1, 4, 1, 1, 2, 1, 1, 2, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 REFERENCES Pure Discrete Spectrum for One Dimensional Substitution Systems of Pisot Type, V. F. Sirvent and B. Solomyak, page 14, example 3 LINKS FORMULA 1->{1, 1, 2}, 2->{3}, 3->{1, 4}, 4->{1} MATHEMATICA s[1] = {1, 1, 2}; s[2] = {3}; s[3] = {1, 4}; s[4] = {1}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[6] CROSSREFS Cf. A106749. Sequence in context: A133233 A174430 A116361 * A265743 A082850 A290695 Adjacent sequences:  A106793 A106794 A106795 * A106797 A106798 A106799 KEYWORD nonn,uned AUTHOR Roger L. Bagula, May 17 2005 STATUS approved

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Last modified July 18 11:48 EDT 2019. Contains 325139 sequences. (Running on oeis4.)