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 A008040 #18 Apr 10 2018 08:26:35 %S A008040 1,4,10,19,32,51,72,96,124,155,196,238,278,324,374,436,500,558,620, %T A008040 688,772,857,934,1014,1098,1203,1310,1405,1504,1606,1730,1858,1972, %U A008040 2089,2210,2355,2502,2634,2770,2909,3076,3244,3392,3546,3704,3892,4082,4248 %N A008040 Coordination sequence T3 for Zeolite Code ATS. %D A008040 W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996 %H A008040 R. W. Grosse-Kunstleve, <a href="/A008040/b008040.txt">Table of n, a(n) for n = 0..1000</a> %H A008040 R. W. Grosse-Kunstleve, <a href="/A005897/a005897.html">Coordination Sequences and Encyclopedia of Integer Sequences</a> %H A008040 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 A008040 Sean A. Irvine, <a href="/A008000/a008000_1.pdf">Generating Functions for Coordination Sequences of Zeolites, after Grosse-Kunstleve, Brunner, and Sloane</a> %H A008040 International Zeolite Association, <a href="http://www.iza-structure.org/databases/">Database of Zeolite Structures</a> %F A008040 G.f.: (1 + x) * (1 + 2*x + 5*x^2 + 7*x^3 + 13*x^4 + 16*x^5 + 18*x^6 + 20*x^7 + 18*x^8 + 16*x^9 + 13*x^10 + 7*x^11 + 5*x^12 + 2*x^13 + x^14) / ((1 - x)^3 * (1 - x + x^2) * (1 + x + x^2) * (1 + x + x^2 + x^3 + x^4)^2). - _Colin Barker_, Dec 21 2015 %K A008040 nonn %O A008040 0,2 %A A008040 _Ralf W. Grosse-Kunstleve_