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 A023448 #21 Jul 28 2024 16:49:38 %S A023448 -6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19, %T A023448 20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42, %U A023448 43,44,45,46,47,48,49,50,51,52,53 %N A023448 a(n) = n-6. %H A023448 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>. %H A023448 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 A023448 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1). %F A023448 From _M. F. Hasler_, Apr 18 2015: (Start) %F A023448 a(n) = 2*a(n-1) - a(n-2). %F A023448 a(n) = -A022962(n). %F A023448 G.f.: (-6+7*x)/(1-x)^2. (End) %t A023448 Range[0, 100] - 6 (* _Paolo Xausa_, Jul 28 2024 *) %o A023448 (PARI) a(n)=n-6 %Y A023448 Cf. A256958, A001057, A000027, A001477, A023443, ..., A023447, A023449, ..., A023482, A022958, ..., A022996. %K A023448 sign,easy %O A023448 0,1 %A A023448 _N. J. A. Sloane_