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 A249372 #28 Aug 06 2021 00:46:12 %S A249372 47,48,56,57,128,129,137,139,147,148,176,177,182,183,185,187,188,190, %T A249372 192,194,195,196,197,199,201,202,203,205,207,209,210,211,212,214,218, %U A249372 220,222,223,227,229,230,232,233,235,237,238,239,240,242,244 %N A249372 Numbers k such that A156257(k) != A074292(k). %C A249372 Related to the position and frequency of runs of length 2 in the Kolakoski sequence A000002. Possible values of the difference A156257 - A074292 are -1, 0, 1, and a 1 seems to be always followed soon by a -1, indicating that the two sequences A074292 and A156257 are not equal but rather close. %H A249372 Jean-Christophe Hervé, <a href="/A249372/b249372.txt">Table of n, a(n) for n = 1..49383</a> %Y A249372 Cf. A000002, A074292, A156257, A247176 (values of the difference). %K A249372 nonn %O A249372 1,1 %A A249372 _Jean-Christophe Hervé_, Nov 22 2014