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 A354739 #13 Jun 05 2022 08:24:40 %S A354739 1,2,4,-2,-3,6,3,8,-15,5,12,-11,22,-18,9,-10,-7,14,7,-12,10,-13,26, %T A354739 -21,16,-17,34,-24,15,-6,-4,18,-25,20,-5,24,-34,25,-20,21,-8,27,-9, %U A354739 -28,-19,38,19,-32,28,-26,-23,46,23,-40,13,30,-35,33,-62,31,32,-47,94,-87,36,-27,-14,35,-16,17 %N A354739 First differences of A354727. %C A354739 See A354727 for further details. %H A354739 Scott R. Shannon, <a href="/A354739/a354739.png">Image of the first 100000 terms</a>. The blue line is y = 0. %e A354739 a(5) = -3 as A354727(6) - A354727(5) = 3 - 6 = -3. %Y A354739 Cf. A354727, A354687, A354575, A354679, A354688. %K A354739 sign %O A354739 1,2 %A A354739 _Scott R. Shannon_, Jun 05 2022