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 A008009 #14 Apr 10 2018 08:26:35 %S A008009 1,4,11,22,38,55,74,98,132,173,216,260,306,353,408,473,547,617,681, %T A008009 748,827,918,1016,1115,1214,1313,1415,1526,1650,1772,1889,2007,2139, %U A008009 2281,2421,2563,2711,2864,3024,3193,3371,3538,3693,3855,4042,4244,4443,4634 %N A008009 Coordination sequence T3 for Zeolite Code AET. %D A008009 W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996 %H A008009 R. W. Grosse-Kunstleve, <a href="/A008009/b008009.txt">Table of n, a(n) for n = 0..1000</a> %H A008009 R. W. Grosse-Kunstleve, <a href="/A005897/a005897.html">Coordination Sequences and Encyclopedia of Integer Sequences</a> %H A008009 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 A008009 Sean A. Irvine, <a href="/A008000/a008000_1.pdf">Generating Functions for Coordination Sequences of Zeolites, after Grosse-Kunstleve, Brunner, and Sloane</a> %H A008009 International Zeolite Association, <a href="http://www.iza-structure.org/databases/">Database of Zeolite Structures</a> %K A008009 nonn %O A008009 0,2 %A A008009 _Ralf W. Grosse-Kunstleve_