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 A340499 #11 Jan 11 2021 21:30:27 %S A340499 0,1,0,-1,2,0,1,0,-1,-2,3,-2,2,-3,4,0,1,0,-1,2,0,1,0,-1,-2,3,-2,2,-3, %T A340499 -4,5,1,-1,-4,1,-1,4,-5,6,-4,4,-3,4,-4,3,-6,7,-5,5,-6,3,-3,6,-7,8,0,1, %U A340499 0,-1,2,0,1,0,-1,-2,3,-2,2,-3,4,0,1,0,-1,2,0,1,0,-1,-2,3,-2,2,-3 %N A340499 First differences of A340488. %C A340499 Absolute values initially agree with A336033 but differ starting at term 32. %H A340499 N. J. A. Sloane, <a href="/A340499/b340499.txt">Table of n, a(n) for n = 1..24999</a> %Y A340499 Cf. A336033, A340488. %K A340499 sign,look %O A340499 1,5 %A A340499 _N. J. A. Sloane_, Jan 11 2021