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 A074261 #12 May 26 2021 02:43:15 %S A074261 3,9,11,12,13,15,19,21,27,39,45,47,57,63,65,66,67,69,75,77,81,83,84, %T A074261 85,87,89,90,91,92,93,94,95,96,97,99,100,101,102,103,105,107,108,109, %U A074261 110,111,112,113,114,115,117,119,120,121,123,127,129,139,145,147 %N A074261 Positions in the Kolakoski sequence (A000002) when the number of 2's is greater than the number of 1's. %H A074261 Nathaniel Johnston, <a href="/A074261/b074261.txt">Table of n, a(n) for n = 1..10000</a> %e A074261 The Kolakoski sequence begins 1,2,2,1,1,2,1,2,2, so this sequence begins with 3,9. %t A074261 (See A342799.) %Y A074261 Cf. A000002, A022292, A342799. %K A074261 nonn,easy %O A074261 1,1 %A A074261 _Jon Perry_, Sep 20 2002 %E A074261 Extended and offset changed by _Nathaniel Johnston_, May 02 2011