This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A261159 #9 Aug 14 2015 05:23:38
%S A261159 5,7,1,11,2,1,3,13,2,2,1,3,12,13,0,7,3,11,1,5,41,12,0,7,1,5,11,2,1,7
%N A261159 List the length of chunks of letters different from 'e', when the sequence is spelled out in French: this is the lexicographically first such sequence of nonnegative integers.
%C A261159 Called "Perec's sequence" by E. Angelini, with reference to Perec's 300 page novel "La disparition", lacking the letter 'e'.
%H A261159 Wikipedia, <a href="https://en.wikipedia.org/wiki/A_Void">A void</a>.
%e A261159 The sequence spelled out in French reads: cinq, sEpt, un, onzE, dEux, un, trois, trEize, ...
%e A261159 Counting the length of chunks of letters different from 'E' ("cinqs", "ptunonz", "d", "uxuntroistr", ...) yields: 5, 7, 1, 11, ..., which reproduces the sequence.
%Y A261159 See A261158 for the English version.
%K A261159 nonn,word,more
%O A261159 1,1
%A A261159 _Eric Angelini_ and _M. F. Hasler_, Aug 11 2015