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 A354679 #19 Jun 05 2022 08:25:01 %S A354679 1,3,-2,4,-3,5,-1,7,-4,-5,11,-7,9,-6,8,2,-11,13,-9,15,-17,19,-13,17, %T A354679 -19,23,-15,21,-25,27,-22,16,-14,6,18,-29,31,-27,29,-23,25,-21,33,-41, %U A354679 37,-35,41,-37,43,-40,22,-16,32,-31,35,10,-51,47,-43,39,-33,49,-47,45,-55,53,-44,14,24,-26 %N A354679 First differences of A354575. %C A354679 See A354575 for further details. %H A354679 Scott R. Shannon, <a href="/A354679/a354679.png">Image of the first 200000 terms</a>. The blue line is y = 0. %e A354679 a(3) = -2 as A354575(4) - A354575(3) = 3 - 5 = -2. %Y A354679 Cf. A354575, A354688, A354727, A354739, A354687. %K A354679 sign,look %O A354679 1,2 %A A354679 _Scott R. Shannon_, Jun 05 2022