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 A023444 #28 Jul 08 2025 17:15:53 %S A023444 -2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23, %T A023444 24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46, %U A023444 47,48,49,50,51,52,53,54,55 %N A023444 a(n) = n-2. %C A023444 The months September to December (9 to 12) are sometimes found in old written French to be abbreviated as 7bre, 8bre, 9bre and 10bre. See Jeff Steiner link. - _Michel Marcus_, Sep 26 2017 %H A023444 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a> %H A023444 Jeff Steiner's Americans in France, <a href="http://www.americansinfrance.net/Culture/Abbreviated-Months.cfm">Abbreviated Months (7bre, 8bre, 9bre, 10bre and Xbre)</a> %H A023444 Robert G. Wilson v, <a href="/A001477/a001477.txt">American English names for the numbers from 0 to 100999 without spaces or hyphens</a>. %H A023444 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1). %F A023444 G.f.: -(2-3*x)/(1-x)^2. - _Bruno Berselli_, Sep 02 2011 %F A023444 a(n) = 2*a(n-1) - a(n-2). a(n) = -A022958(n). - _M. F. Hasler_, Apr 18 2015 %t A023444 Range[-2, 100] (* _Wesley Ivan Hurt_, Sep 10 2023 *) %o A023444 (PARI) a(n)=n-2 %Y A023444 Cf. A256958, A001057, A000027, A001477, A023443, A023445, ..., A023482, A022958, ..., A022996. %K A023444 sign,easy %O A023444 0,1 %A A023444 _N. J. A. Sloane_