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 A008019 #14 Apr 10 2018 08:26:35 %S A008019 1,4,9,16,27,43,63,88,115,141,171,210,255,300,343,388,443,505,565,627, %T A008019 695,768,846,923,998,1082,1177,1273,1369,1464,1557,1663,1781,1895, %U A008019 2012,2135,2254,2378,2512,2643,2778,2927,3074,3216,3362,3512,3674,3843,4005 %N A008019 Coordination sequence T1 for Zeolite Code AFR. %D A008019 W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996 %H A008019 R. W. Grosse-Kunstleve, <a href="/A008019/b008019.txt">Table of n, a(n) for n = 0..1000</a> %H A008019 R. W. Grosse-Kunstleve, <a href="/A005897/a005897.html">Coordination Sequences and Encyclopedia of Integer Sequences</a> %H A008019 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 A008019 Sean A. Irvine, <a href="/A008000/a008000_1.pdf">Generating Functions for Coordination Sequences of Zeolites, after Grosse-Kunstleve, Brunner, and Sloane</a> %H A008019 International Zeolite Association, <a href="http://www.iza-structure.org/databases/">Database of Zeolite Structures</a> %K A008019 nonn %O A008019 0,2 %A A008019 _Ralf W. Grosse-Kunstleve_