Search: id:A121993
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%I A121993
%S A121993 33,44,55,66,77,88,99,111,222,333,444,555,666,777,888,999,1111,1222,
%T A121993 1333,1444,1555,1666,1777,1888,1999,2000,2111,2222,2233,2244,2255,2266,
%U A121993 2277,2288,2299,2333,2444,2555,2666,2777,2888,2999,3000,3111,3222,3300
%N A121993 Numbers n that yield a smaller number a(n) under the "Look and Say" function 
               A045918.
%H A121993 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               LookandSaySequence.html">Look and Say Sequence</a>.
%e A121993 E.g. a(26)=2000 because under the Look and Say operator, 2000 is described 
               as one two three zeros or: 1230, which is smaller than 2000.
%Y A121993 Cf. A045918, A005150, A005341, A023989, A079475.
%Y A121993 Sequence in context: A045241 A046041 A140151 this_sequence A050875 A060876 
               A070121
%Y A121993 Adjacent sequences: A121990 A121991 A121992 this_sequence A121994 A121995 
               A121996
%K A121993 easy,nonn,base
%O A121993 1,1
%A A121993 Sergio Pimentel (ferdiego(AT)cox.net), Sep 11 2006

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