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 A098154 Summarize the previous term in ternary (in increasing order). 2
 1, 11, 21, 1112, 10112, 1010112, 2011112, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122, 1011122 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Similar to A005151 but uses base 3: Let a(1)=1. Describing a(1) as "one 1" again gives a(2)=11 (same digit string as A005151 and similar sequences). Likewise, a(3) and a(4) have same digit strings as all but the binary sequence, but describing a(4) as "three 1's, one 2" gives a(5)=10112 when the frequency of digit occurrence is written in ternary and followed by the digit counted. LINKS Table of n, a(n) for n=1..27. FORMULA a(n) = 1011122 for all n >= 8 (see example). EXAMPLE Summarizing a(8) = 1011122 in increasing digit order, there are "one 0, four 1's, two 2s", so concatenating 1 0 11 1 2 2 gives a(9) = 1011122 (=a(10)=a(11)=...). CROSSREFS Cf. A098153 (binary), A098155 (base 4), A005151 (decimal and digit strings for all other bases b >= 5). Sequence in context: A006711 A005151 A098155 * A007890 A063850 A005150 Adjacent sequences: A098151 A098152 A098153 * A098155 A098156 A098157 KEYWORD base,easy,nonn AUTHOR Rick L. Shepherd, Aug 29 2004 STATUS approved

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Last modified May 21 07:02 EDT 2024. Contains 372729 sequences. (Running on oeis4.)