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%I #3 Mar 30 2012 17:36:43
%S 1,11,21,1112,10112,1010112,2011112,1011122,1011122,1011122,1011122,
%T 1011122,1011122,1011122,1011122,1011122,1011122,1011122,1011122,
%U 1011122,1011122,1011122,1011122,1011122,1011122,1011122,1011122
%N Summarize the previous term in ternary (in increasing order).
%C 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.
%F a(n) = 1011122 for all n >= 8 (see example).
%e 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)=...).
%Y Cf. A098153 (binary), A098155 (base 4), A005151 (decimal and digit strings for all other bases b >= 5).
%K base,easy,nonn
%O 1,2
%A _Rick L. Shepherd_, Aug 29 2004
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