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A106589 Three-symbol substitution based on Rauzy: adding one 3 to second substitution: characteristic polynomial: x^3-x^2-2*x-2. 0
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; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..104.

Curtis McMullen, Prym varieties and Teichm├╝ller curves, Duke Math. J., Volume 133, Number 3 (2006), 405-616

FORMULA

1->{2}, 2->{3, 3} 3->{1, 2, 3}.

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]

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 */

CROSSREFS

Sequence in context: A204259 A066517 A108132 * A294101 A051911 A106595

Adjacent sequences:  A106586 A106587 A106588 * A106590 A106591 A106592

KEYWORD

nonn,uned

AUTHOR

Roger L. Bagula, May 10 2005

STATUS

approved

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Last modified October 18 00:09 EDT 2019. Contains 328135 sequences. (Running on oeis4.)