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 A008606 #59 Mar 02 2025 10:03:46
%S A008606 0,24,48,72,96,120,144,168,192,216,240,264,288,312,336,360,384,408,
%T A008606 432,456,480,504,528,552,576,600,624,648,672,696,720,744,768,792,816,
%U A008606 840,864,888,912,936,960,984,1008,1032,1056,1080,1104,1128,1152,1176,1200
%N A008606 Multiples of 24.
%C A008606 If n is a multiple of 24, also the sum of the divisors of n-1 is a multiple of 24. - _Vincenzo Librandi_, Apr 12 2014
%C A008606 This is the sequence of numbers n such that A259748(n)/n = 11/12. - _Danny Rorabaugh_, Oct 22 2015
%H A008606 Vincenzo Librandi, <a href="/A008606/b008606.txt">Table of n, a(n) for n = 0..1000</a>
%H A008606 Milan Janjic, <a href="https://web.archive.org/web/20181128194755/http://www.pmfbl.org/janjic/">Enumerative Formulas for Some Functions on Finite Sets</a>.
%H A008606 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>.
%H A008606 INRIA Algorithms Project, <a href="http://ecs.inria.fr/services/structure?nbr=336">Encyclopedia of Combinatorial Structures 336</a>.
%H A008606 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1).
%F A008606 G.f.: 24*x/(1-x)^2. - _Vincenzo Librandi_, Jun 11 2013
%F A008606 a(n) = 24*A001477(n) - _Danny Rorabaugh_, Oct 24 2015
%F A008606 E.g.f.: 24*x*exp(x). - _Stefano Spezia_, Mar 02 2025
%t A008606 Range[0, 1500, 24] (* _Vladimir Joseph Stephan Orlovsky_, Jun 01 2011 *)
%t A008606 CoefficientList[Series[24 x / (x - 1)^2, {x, 0, 60}], x] (* _Vincenzo Librandi_, Jun 11 2013 *)
%o A008606 (PARI) a(n)=24*n \\ _Charles R Greathouse IV_, Sep 24 2015
%Y A008606 Cf. A008604, A008605.
%K A008606 nonn,easy
%O A008606 0,2
%A A008606 _N. J. A. Sloane_