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 A107297 Three-symbol substitution with Pisot characteristic polynomial: x^3-3*x^2-1. 0
 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 3, 1, 1, 2, 1, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Matrix isomer: 1->{3},{2->{2,1,2,2},3->{2} I found this while trying to get a substitution for the Frougny real root characteristic polynomial: x^3-3*x^2+1 LINKS FORMULA 1->{1, 3, 1, 1}, 2->{1}, 2->{2} MATHEMATICA s[1] = {1, 3, 1, 1}; s[2] = {1}; s[3] = {2}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[5] CROSSREFS Cf. A106748, A106749. Sequence in context: A176494 A157229 A242248 * A107296 A080847 A326406 Adjacent sequences:  A107294 A107295 A107296 * A107298 A107299 A107300 KEYWORD nonn,uned AUTHOR Roger L. Bagula, May 20 2005 STATUS approved

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Last modified May 18 12:36 EDT 2021. Contains 343995 sequences. (Running on oeis4.)