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%I #7 Dec 11 2015 22:00:14
%S 1,3,11,13,31,111,113,131,133,311,1113,1131,1133,1311,1331,3111,3113,
%T 11131,11133,11311,11331,13111,13113,13311,31131,31133,111311,111331,
%U 113111,113311,311311,311331,1113111,1113311,3113111,3113311
%N Maximal nonempty {1,3}-chunks of a 4-day-old string in a "Look and Say" sequence.
%C A chunk of a string is a substring of consecutive digits.
%C A 4-day-old string has no chunks of the form 233, 13112 or 13312.
%H R. A. Litherland, <a href="https://www.math.lsu.edu/~lither/jhc/cct.pdf">Conway’s Cosmological Theorem</a>
%Y Cf. A005150.
%K nonn,fini,full,base
%O 1,2
%A _Arkadiusz Wesolowski_, Jun 18 2014
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