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 A107297 Three-symbol substitution with Pisot characteristic polynomial: x^3-3*x^2-1. 0

%I

%S 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,

%T 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,

%U 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

%N Three-symbol substitution with Pisot characteristic polynomial: x^3-3*x^2-1.

%C 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

%F 1->{1, 3, 1, 1}, 2->{1}, 2->{2}

%t 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]

%Y Cf. A106748, A106749.

%K nonn,uned

%O 0,2

%A _Roger L. Bagula_, May 20 2005

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Last modified December 2 15:00 EST 2022. Contains 358510 sequences. (Running on oeis4.)