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A106589
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Three-symbol substitution based on Rauzy: adding one 3 to second substitution: characteristic polynomial: x^3-x^2-2*x-2.
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0
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2, 3, 3, 1, 2, 3, 2, 3, 3, 1, 2, 3, 3, 3, 1, 2, 3, 1, 2, 3, 2, 3, 3, 1, 2, 3, 3, 3, 1, 2, 3, 1, 2, 3, 2, 3, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3, 3, 1, 2, 3, 2, 3, 3, 1, 2, 3, 3, 3, 1, 2, 3, 1, 2, 3, 2, 3, 3, 1, 2, 3, 2, 3, 3, 1, 2, 3, 2, 3, 3, 1, 2, 3, 3, 3, 1, 2, 3, 1, 2, 3, 2, 3, 3, 1, 2, 3, 3, 3, 1, 2, 3, 1, 2
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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REFERENCES
| Curtis McMullen, Prym varieties and Teichmueller curves, May 04, 2005
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FORMULA
| 1->{2}, 2->{3, 3} 3->{1, 2, 3}.
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MATHEMATICA
| s[1] = {2}; s[2] = {3, 3}; s[3] = {1, 2, 3}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[7]
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PROG
| (PARI) {a(n)=local(A); if(n<1, 0, A=[2]; while(length(A)<n|A[1]!=2, A=concat(vector(length(A), k, [[2], [3, 3], [1, 2, 3]][A[k]]))); A[n])} /* Michael Somos May 16 2005 */
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CROSSREFS
| Sequence in context: A204259 A066517 A108132 * A051911 A106595 A181608
Adjacent sequences: A106586 A106587 A106588 * A106590 A106591 A106592
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KEYWORD
| nonn,uned
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AUTHOR
| Roger L. Bagula (rlbagulatftn(AT)yahoo.com), May 10 2005
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