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 A070951 #15 May 04 2023 12:33:40
%S A070951 0,0,2,1,5,2,8,3,10,7,10,9,13,8,16,9,18,16,17,15,20,20,22,19,23,24,27,
%T A070951 22,27,25,30,24,39,28,40,25,41,31,39,34,34,42,40,38,51,36,51,44,53,46,
%U A070951 58,44,53,47,60,46,56,55,61,50,60,53,66,49,65,75,68,66,68,72
%N A070951 Number of 0's in n-th row of triangle in A070950.
%C A070951 a(n) + A070952(n) = 2*n + 1. - _Reinhard Zumkeller_, Jun 07 2013
%H A070951 Reinhard Zumkeller, <a href="/A070951/b070951.txt">Table of n, a(n) for n = 0..10000</a>
%t A070951 steps = 100; Count[#, 0]& /@ MapIndexed[ Take[#1, {steps - First[#2] + 2, steps + First[#2]}]&, CellularAutomaton[30, {{1}, 0}, steps]] (* _Jean-François Alcover_, Oct 07 2013 *)
%o A070951 (Haskell)
%o A070951 a070951 = length . filter (== 0) . a070950_row
%o A070951 -- _Reinhard Zumkeller_, Jun 06 2013
%Y A070951 Cf. A070950, A070952.
%K A070951 nonn,easy,nice
%O A070951 0,3
%A A070951 _N. J. A. Sloane_, May 19 2002
%E A070951 More terms from _Hans Havermann_, May 26 2002