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 A269733 #15 Aug 10 2023 07:16:32 %S A269733 1,1,1,1,3,3,-5,3,3,-5,3,3,8,8,-13,8,8,-13,8,-13,8,8,-13,8,8,-13,8, %T A269733 -13,8,8,-13,8,8,21,21,-34,21,21,-34,21,-34,21,21,-34,21,21,-34,21, %U A269733 -34,21,21,-34,21,-34,21,21,-34,21,21,-34,21,-34,21,21,-34,21,21,-34,21,-34,21,21,-34,21,-34,21,21,-34,21,21 %N A269733 First differences of A269729. %C A269733 John Conway remarks that he can explain why the terms of this sequence are (up to sign) Fibonacci numbers. %D A269733 J. H. Conway, Postings to Math Fun Mailing List, Nov 25 1996 and Dec 02 1996. %H A269733 Jean-François Alcover, <a href="/A269733/a269733.png">Plot of differences</a> %H A269733 J. H. Conway, Allan Wechsler, Marc LeBrun, Dan Hoey, N. J. A. Sloane, <a href="/A269725/a269725.txt">On Kimberling Sums and Para-Fibonacci Sequences</a>, Correspondence and Postings to Math-Fun Mailing List, Nov 1996 to Jan 1997 %p A269733 [seq(A269729(n),n=0..120)] ; %p A269733 DIFF(%) ; # _R. J. Mathar_, May 08 2019 %Y A269733 Cf. A269729. %K A269733 sign,easy %O A269733 0,5 %A A269733 _N. J. A. Sloane_, Mar 08 2016 %E A269733 More terms from _R. J. Mathar_, May 08 2019