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 A008003 #15 Apr 10 2018 08:26:35 %S A008003 1,4,9,17,29,45,65,87,113,143,176,214,253,297,345,395,451,507,568,634, %T A008003 700,772,848,928,1010,1093,1184,1278,1373,1472,1575,1684,1793,1905, %U A008003 2025,2146,2268,2394,2528,2665,2800,2940,3086,3237,3388,3542,3704,3867,4032 %N A008003 Coordination sequence T3 for Zeolite Code AEI. %D A008003 W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996 %H A008003 R. W. Grosse-Kunstleve, <a href="/A008003/b008003.txt">Table of n, a(n) for n = 0..1000</a> %H A008003 R. W. Grosse-Kunstleve, <a href="/A005897/a005897.html">Coordination Sequences and Encyclopedia of Integer Sequences</a> %H A008003 R. W. Grosse-Kunstleve, G. O. Brunner and N. J. A. Sloane, <a href="http://neilsloane.com/doc/ac96cs/">Algebraic Description of Coordination Sequences and Exact Topological Densities for Zeolites</a>, Acta Cryst., A52 (1996), pp. 879-889. %H A008003 Sean A. Irvine, <a href="/A008000/a008000_1.pdf">Generating Functions for Coordination Sequences of Zeolites, after Grosse-Kunstleve, Brunner, and Sloane</a> %H A008003 International Zeolite Association, <a href="http://www.iza-structure.org/databases/">Database of Zeolite Structures</a> %K A008003 nonn %O A008003 0,2 %A A008003 _Ralf W. Grosse-Kunstleve_