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 A153827 #12 Oct 16 2015 23:01:13 %S A153827 0,2,8,22,23,24,25,26,45,71,91,115,119,121,125,127,276,277,278,279, %T A153827 280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296, %U A153827 297,298,395,396,397,398,399,514,525,526,531,532,633,634,635,636,637 %N A153827 Index sequence to A089840: positions of bijections that preserve A129593 (that is, they permute the Łukasiewicz-word computed for a general tree). %C A153827 These elements form a subgroup in A089840 (A089839). %H A153827 A. Karttunen, <a href="/A153827/b153827.txt">Table of n, a(n) for n = 0..11422</a> %H A153827 A. Karttunen, <a href="/A089839/a089839.c.txt">C-program for computing the initial terms of this sequence</a> %H A153827 OEIS Wiki, <a href="/wiki/Łukasiewicz_words">Łukasiewicz words</a> %H A153827 <a href="/index/Lu#Lukasiewicz">Index entries for sequences related to Łukasiewicz</a> %Y A153827 Superset of A153826. %Y A153827 Cf. A153828, A153829, A153830, A153831, A153832, A153833. %K A153827 nonn %O A153827 0,2 %A A153827 _Antti Karttunen_, Jan 07 2009