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A103748 Triangle read by rows, based on the morphism f: 1->{2}, 2->{3}, 3->{3,3,2,1}. First row is 1. If current row is a,b,c,..., then the next row is a,b,c,...,f(a),f(b),f(c),... 2
1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 3, 3, 2, 1, 1, 2, 2, 3, 2, 3, 3, 3, 3, 2, 1, 2, 3, 3, 3, 3, 2, 1, 3, 3, 3, 2, 1, 3, 3, 2, 1, 3, 3, 2, 1, 3, 3, 2, 1, 3, 2, 1, 2, 2, 3, 2, 3, 3, 3, 3, 2, 1, 2, 3, 3, 3, 3, 2, 1, 3, 3, 3, 2, 1, 3, 3, 2, 1, 3, 3, 2, 1, 3, 3, 2, 1, 3, 2, 2, 3, 3, 3, 3, 2, 1, 3, 3, 3, 2, 1, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Kenyon tile substitution sequence.

LINKS

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

Richard Kenyon, The Construction of Self-Similar Tilings

MATHEMATICA

s[n_] := n /. {1 -> 2, 2 -> 3, 3 -> {3, 3, 2, 1}}; t[a_] := Join[a, Flatten[s /@ a]]; Flatten[ NestList[t, {1}, 5]]

CROSSREFS

Cf. A073058, A099206.

Sequence in context: A104232 A072086 A180094 * A104231 A105111 A105112

Adjacent sequences:  A103745 A103746 A103747 * A103749 A103750 A103751

KEYWORD

nonn,tabf

AUTHOR

Roger L. Bagula, Mar 28 2005

STATUS

approved

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Last modified April 4 20:53 EDT 2020. Contains 333229 sequences. (Running on oeis4.)