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 A253061 #10 May 21 2019 03:05:27 %S A253061 2,5,6,8,10,11,12,16,21,22,23,24,26,27,30,32,35,38,39,40,42,46,47,53, %T A253061 55,56,58,59,60,61,62,65,66,69,70,71,72,73,74,76,78,80,81,85,86,87,90, %U A253061 94,96,98,105,106,108,109,111,114,115,119,121,122,123,124,129,132 %N A253061 Indices of 1's in Ehrenfeucht-Mycielski sequence A038219. %C A253061 Also positions of 2's in A007061. %H A253061 Rémy Sigrist, <a href="/A253061/b253061.txt">Table of n, a(n) for n = 1..25000</a> %Y A253061 Cf. A007061, A038219, A253060. %K A253061 nonn %O A253061 1,1 %A A253061 _N. J. A. Sloane_, Jan 18 2015