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A107335
Count down Pisot cubic substitution with characteristic polynomial:x^3-3*x^2-2*x-1.
0
1, 1, 3, 2, 3, 1, 1, 1, 3, 2, 3, 1, 1, 3, 1, 1, 1, 3, 2, 3, 1, 1, 1, 3, 2, 3, 1, 1, 1, 3, 2, 3, 1, 1, 3, 1, 1, 1, 3, 2, 3, 1, 1, 1, 3, 2, 3, 1, 1, 1, 1, 3, 2, 3, 1, 1, 1, 3, 2, 3, 1, 1, 1, 3, 2, 3, 1, 1, 3, 1, 1, 1, 3, 2, 3, 1, 1, 1, 3, 2, 3, 1, 1, 1, 3, 2, 3, 1, 1, 3, 1, 1, 1, 3, 2, 3, 1, 1, 1, 3, 2, 3, 1, 1, 1
OFFSET
0,3
COMMENTS
x^3-D[x^3+x^2+x+1,x]=:x^3-3*x^2-1*x-1 (x-1)*(x^3+x^2+x+1)=x^4-1
FORMULA
1->{1, 3, 2, 3, 1}, 2->{3}, 3->{1}
MATHEMATICA
s[1] = {1, 1, 3, 2, 3, 1}; s[2] = {3}; s[3] = {1}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[4]
CROSSREFS
Sequence in context: A369605 A085747 A106693 * A375782 A341850 A341847
KEYWORD
nonn,uned
AUTHOR
Roger L. Bagula, May 22 2005
STATUS
approved