OFFSET
0,2
COMMENTS
Complex inverse of this polynomial is a real root Pisot
FORMULA
1->{1, 3, 3, 1}, 2->{3}, 3->{1.2}
MATHEMATICA
s[1] = {1, 3, 3, 1}; s[2] = {3}; s[3] = {1, 2}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[5]
CROSSREFS
KEYWORD
nonn,uned
AUTHOR
Roger L. Bagula, May 22 2005
STATUS
approved