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 A105061 Triangle read by rows, based on the morphism f: 1->2, 2->3, 3->4, 4->5, 5->{5,5,9,6}, 6->7, 7->8, 8->9, 9->10, 10->{10,10,4,1}. 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),... 1
 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 5, 5, 9, 6, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 5, 5, 9, 6, 2, 3, 3, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Level five bi-Kenyon substitution sequence. LINKS Richard Kenyon, The Construction of Self-Similar Tilings MATHEMATICA s[n_] := n /. {1 -> 2, 2 -> 3, 3 -> 4, 4 -> 5, 5 -> {5, 5, 9, 6}, 6 -> 7, 7 -> 8, 8 -> 9, 9 -> 10, 10 -> {10, 10, 4, 1}}; t[a_] := Join[a, Flatten[s /@ a]]; Flatten[ NestList[t, {1}, 6]] CROSSREFS Cf. A000120, A073058. Sequence in context: A105113 A207328 A105056 * A105164 A000120 A105062 Adjacent sequences:  A105058 A105059 A105060 * A105062 A105063 A105064 KEYWORD nonn,tabf AUTHOR Roger L. Bagula, Apr 05 2005 STATUS approved

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Last modified April 6 11:38 EDT 2020. Contains 333273 sequences. (Running on oeis4.)