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 A022976 #13 Jul 29 2024 06:12:16 %S A022976 20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,-1,-2,-3,-4,-5, %T A022976 -6,-7,-8,-9,-10,-11,-12,-13,-14,-15,-16,-17,-18,-19,-20,-21,-22,-23, %U A022976 -24,-25,-26,-27,-28,-29,-30,-31,-32,-33,-34,-35,-36,-37,-38,-39,-40 %N A022976 a(n) = 20-n. %H A022976 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>. %H A022976 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1). %t A022976 21-Range[70] (* or *) NestList[#-1&,20,60] (* _Harvey P. Dale_, Mar 28 2020 *) %Y A022976 Cf. A022958 - A022995. %K A022976 sign %O A022976 0,1 %A A022976 _N. J. A. Sloane_