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 A071052 #12 Aug 04 2020 06:07:05 %S A071052 0,0,2,2,6,2,8,4,14,10,12,8,20,12,18,10,30,26,28,24,32,16,30,14,44,36, %T A071052 38,30,46,26,40,20,62,58,60,56,64,48,62,46,72,56,58,42,74,46,60,32,92, %U A071052 84,86,78,90,62,84,56,102,82,84,64,100,60,82,42,126,122,124 %N A071052 Number of 0's in n-th row of triangle in A071036 (cellular automaton "Rule 150"). %D A071052 S. Wolfram, A New Kind of Science, Wolfram Media, 2002; Chapter 3. %H A071052 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %F A071052 a(2n) = a(n) + 2n (conjectured). - _Ralf Stephan_, Mar 03 2004 %Y A071052 Cf. A071053 (number of 1's). %K A071052 nonn %O A071052 0,3 %A A071052 _Hans Havermann_, May 26 2002