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 A330328 #7 Dec 13 2019 17:13:40 %S A330328 1,0,-2,-1,4,1,3,2,-4,-2,-2,-3,0,-6,2,-8,11,-4,11,-2,7,0,6,3,1,3,4,9, %T A330328 -4,7,0,15,-17,4,-10,8,-14,-3,-5,-1,-3,-8,2,-8,3,-14,6,-17,14,-18,15, %U A330328 -21,15,-25,13,-34,30,-30,28,-37,31,-37,23,-52,55 %N A330328 First differences of A303028. %H A330328 N. J. A. Sloane, <a href="/A330328/b330328.txt">Table of n, a(n) for n = 0..10999</a> %Y A330328 Cf. A303028. %K A330328 sign,look %O A330328 0,3 %A A330328 _N. J. A. Sloane_, Dec 13 2019