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Search: id:A105258
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| A105258 |
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Triangle of trajectory of 1 under the morphism 1->2, 2->13, 3->1. |
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+0
1
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| 1, 1, 2, 1, 2, 2, 1, 3, 1, 2, 2, 1, 3, 2, 1, 3, 1, 3, 2, 1, 1, 2, 2, 1, 3, 2, 1, 3, 1, 3, 2, 1, 2, 1, 3, 1, 3, 2, 1, 1, 3, 2, 1, 2, 1, 1, 3, 2, 1, 2, 2, 1, 3, 2, 1, 3, 1, 3, 2, 1, 2, 1, 3, 1, 3, 2, 1, 1, 3, 2, 1, 2, 1, 1, 3, 2, 2, 1, 3, 1, 3, 2, 1, 1, 3, 2, 1, 2, 1, 1, 3, 2, 1, 3, 2, 1, 2, 1, 1, 3, 2, 2, 1, 1, 3
(list; graph; listen)
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OFFSET
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0,3
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EXAMPLE
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The first steps are:
{1}
{1, 2}
{1, 2, 2, 1, 3}
{1, 2, 2, 1, 3, 2, 1, 3, 1, 3, 2, 1}
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MATHEMATICA
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s[1] = {2}; s[2] = {1, 3}; s[3] = {1}; t[a_] := Join[a, Flatten[s /@ a]]; p[0] = {1}; p[1] = t[{1}]; p[n_] := t[p[n - 1]] aa = Flatten[Table[p[n], {n, 0, 6}]]
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PROGRAM
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(PARI) {a(n)=local(m, v, w); v=w=[1]; while(length(w)<n, m=length(v); for(k=1, m, v=concat(v, [[2], [1, 3], [1]][v[k]])); w=concat(w, v)); w[n]}
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CROSSREFS
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Cf. A073058, A105111.
Sequence in context: A107030 A050362 A095686 this_sequence A160696 A152545 A109967
Adjacent sequences: A105255 A105256 A105257 this_sequence A105259 A105260 A105261
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KEYWORD
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nonn
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Apr 14 2005
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EXTENSIONS
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Edited by the Associate Editors of the OEIS, Apr 07 2009
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