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 A008004 #15 Apr 10 2018 08:26:35 %S A008004 1,4,11,21,37,59,85,114,150,189,232,279,331,390,455,519,589,667,748, %T A008004 831,921,1015,1115,1220,1327,1439,1560,1679,1802,1936,2073,2213,2361, %U A008004 2507,2659,2820,2982,3150,3327,3501,3681,3871,4061,4254,4458,4661,4868,5085 %N A008004 Coordination sequence T1 for Zeolite Code AEL. %D A008004 W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996 %H A008004 R. W. Grosse-Kunstleve, <a href="/A008004/b008004.txt">Table of n, a(n) for n = 0..1000</a> %H A008004 R. W. Grosse-Kunstleve, <a href="/A005897/a005897.html">Coordination Sequences and Encyclopedia of Integer Sequences</a> %H A008004 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 A008004 Sean A. Irvine, <a href="/A008000/a008000_1.pdf">Generating Functions for Coordination Sequences of Zeolites, after Grosse-Kunstleve, Brunner, and Sloane</a> %H A008004 International Zeolite Association, <a href="http://www.iza-structure.org/databases/">Database of Zeolite Structures</a> %K A008004 nonn %O A008004 0,2 %A A008004 _Ralf W. Grosse-Kunstleve_