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 A008023 #14 Apr 10 2018 08:26:35 %S A008023 1,4,9,17,28,42,60,83,111,138,166,207,251,286,329,386,441,493,553,622, %T A008023 690,751,818,903,991,1064,1142,1248,1352,1430,1518,1642,1766,1858, %U A008023 1957,2099,2235,2330,2440,2598,2752,2865,2986,3161,3333,3448,3573,3772,3971 %N A008023 Coordination sequence T1 for Zeolite Code AFS. %D A008023 W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996 %H A008023 R. W. Grosse-Kunstleve, <a href="/A008023/b008023.txt">Table of n, a(n) for n = 0..1000</a> %H A008023 R. W. Grosse-Kunstleve, <a href="/A005897/a005897.html">Coordination Sequences and Encyclopedia of Integer Sequences</a> %H A008023 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 A008023 Sean A. Irvine, <a href="/A008000/a008000_1.pdf">Generating Functions for Coordination Sequences of Zeolites, after Grosse-Kunstleve, Brunner, and Sloane</a> %H A008023 International Zeolite Association, <a href="http://www.iza-structure.org/databases/">Database of Zeolite Structures</a> %K A008023 nonn %O A008023 0,2 %A A008023 _Ralf W. Grosse-Kunstleve_