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 A383443 #13 May 05 2025 11:45:38 %S A383443 1,1,-3,-1,-1,6,1,1,-10,1,10,1,1,-15,1,15,1,1,-21,1,1,-3,-1,-1,-1,28, %T A383443 -1,-1,3,1,1,1,-36,3,-1,-1,36,1,1,1,1,-45,3,-1,-1,45,1,1,1,1,-55,3,1, %U A383443 -3,1,-3,-1,-1,-1,-1,-1,66,-3,-1,3,-1,3,1,1,1,1,1,-78,3,1,1,-3,-1,78,1,1,1,1,1,1,-91,3,1,1,-3,-1,91 %N A383443 First differences of A383442. %C A383443 These are the successive steps made during the construction of A383442. %H A383443 Paolo Xausa, <a href="/A383443/b383443.txt">Table of n, a(n) for n = 0..10000</a> %t A383443 (* A383442list is defined at A383442 *) %t A383443 Differences[A383442list[100]] (* _Paolo Xausa_, May 05 2025 *) %Y A383443 Cf. A383442, A383688. %K A383443 sign %O A383443 0,3 %A A383443 _N. J. A. Sloane_, May 03 2025