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 A008587 #86 May 26 2025 09:52:05
%S A008587 0,5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100,105,
%T A008587 110,115,120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,
%U A008587 195,200,205,210,215,220,225,230,235,240,245,250,255,260,265,270,275
%N A008587 Multiples of 5: a(n) = 5 * n.
%C A008587 1/31 = 0.0322580645... = (1/2)^5 + (1/2)^10 + (1/2)^15 + ... - _Gary W. Adamson_, Mar 14 2009
%C A008587 Complement of A047201; A079998(a(n))=1; A011558(a(n))=0. - _Reinhard Zumkeller_, Nov 30 2009
%C A008587 The y-intercept of a line perpendicular to y=mx,where m is the slope a/b and in this case a=2 and b=1, is a^2 + b^2 or 5, the first value of the list given. The remaining value are multiples of the first number of the list. - _Larry J Zimmermann_, Aug 21 2010
%D A008587 Alfred S. Posamentier, Math Charmers, Tantalizing Tidbits for the Mind, Prometheus Books, NY, 2003, page 85.
%H A008587 Vincenzo Librandi, <a href="/A008587/b008587.txt">Table of n, a(n) for n = 0..1000</a>
%H A008587 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>
%H A008587 INRIA Algorithms Project, <a href="http://ecs.inria.fr/services/structure?nbr=317">Encyclopedia of Combinatorial Structures 317</a>
%H A008587 Luis Manuel Rivera, <a href="http://arxiv.org/abs/1406.3081">Integer sequences and k-commuting permutations</a>, arXiv preprint arXiv:1406.3081 [math.CO], 2014-2015.
%H A008587 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1).
%F A008587 From _R. J. Mathar_, May 26 2008: (Start)
%F A008587 O.g.f.: 5x/(1-x)^2.
%F A008587 a(n) = A008706(n), n > 0. (End)
%F A008587 a(n) = Sum_{k>=0} A030308(n,k)*A020714(k). - _Philippe Deléham_, Oct 17 2011
%F A008587 E.g.f.: 5*x*exp(x). - _Stefano Spezia_, Aug 19 2024
%t A008587 Range[0, 500, 5] (* _Vladimir Joseph Stephan Orlovsky_, May 26 2011 *)
%t A008587 NestList[#+5&,0,60] (* _Harvey P. Dale_, Dec 18 2023 *)
%o A008587 (Maxima) makelist(5*n,n,0,20); /* _Martin Ettl_, Dec 17 2012 */
%o A008587 (Magma) [5*n: n in [0..60]]; // _Vincenzo Librandi_, Jun 10 2013
%o A008587 (PARI) a(n)=5*n \\ _Charles R Greathouse IV_, Mar 22 2016
%Y A008587 Cf. index to numbers of the form n*(d*n+10-d)/2 in A140090.
%Y A008587 Cf. A008706, A011558, A020714, A030308, A047201, A079998.
%K A008587 nonn,easy
%O A008587 0,2
%A A008587 _N. J. A. Sloane_