%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 Threesymbol substitution with Pisot characteristic polynomial: x^33*x^21.
%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^33*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
