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 A303598 #21 Jun 03 2018 10:55:29 %S A303598 1,1,1,1,-1,-1,2,1,-2,1,1,-1,-1,2,1,-2,2,-2,2,-1,1,-1,-1,2,-2,3,-1,-1, %T A303598 1,-1,2,-2,1,1,-2,1,1,-2,1,1,-2,2,-2,2,-1,1,-1,1,-1,1,-1,2,-3,2,1,-3, %U A303598 2,1,-3,2,1,-2,1,-1,1,-1,1,-1,2,-2,1,1,-2,2,-3,3,-1,1,-2,1,1,-1,1,-1,-1,2,-1,1,-1,1,-1,1 %N A303598 First differences of A303597. %C A303598 Created as part of a study to try to show that A252867 is a permutation, and, more specifically, to understand terms 6171 - 7025 of A252867 (see the graph of that sequence). %H A303598 N. J. A. Sloane, <a href="/A303598/b303598.txt">Table of n, a(n) for n = 0..49999</a> %Y A303598 Cf. A252867, A303596, A303597, A303599, A305368. %K A303598 sign %O A303598 0,7 %A A303598 _N. J. A. Sloane_, May 31 2018 %E A303598 Signs corrected by _N. J. A. Sloane_, Jun 03 2018