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 A008027 #14 Apr 10 2018 08:26:35 %S A008027 1,4,9,17,29,45,64,86,113,144,178,215,254,297,345,397,451,507,570,638, %T A008027 706,776,851,932,1015,1099,1188,1281,1378,1479,1583,1691,1801,1914, %U A008027 2032,2154,2279,2405,2536,2675,2816,2956,3099,3250,3406,3561,3718,3881,4049 %N A008027 Coordination sequence T2 for Zeolite Code AFT. %D A008027 W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996 %H A008027 R. W. Grosse-Kunstleve, <a href="/A008027/b008027.txt">Table of n, a(n) for n = 0..1000</a> %H A008027 R. W. Grosse-Kunstleve, <a href="/A005897/a005897.html">Coordination Sequences and Encyclopedia of Integer Sequences</a> %H A008027 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 A008027 Sean A. Irvine, <a href="/A008000/a008000_1.pdf">Generating Functions for Coordination Sequences of Zeolites, after Grosse-Kunstleve, Brunner, and Sloane</a> %H A008027 International Zeolite Association, <a href="http://www.iza-structure.org/databases/">Database of Zeolite Structures</a> %F A008027 G.f.: (1 + 4*x + 9*x^2 + 73*x^20 + 68*x^15 + 69*x^17 + 74*x^19 + 71*x^21 + 67*x^22 + 60*x^23 + 51*x^24 + 40*x^25 + 28*x^26 + 17*x^27 + 9*x^28 + 4*x^29 + x^30 + 28*x^4 + 40*x^5 + 51*x^6 + 60*x^7 + 67*x^8 + 71*x^9 + 73*x^10 + 74*x^11 + 72*x^12 + 69*x^13 + 68*x^14 + 68*x^16 + 72*x^18 + 17*x^3) / (1-x^4) / (1-x^5) / (1-x^21). - _Sean A. Irvine_, Mar 13 2018 %K A008027 nonn %O A008027 0,2 %A A008027 _Ralf W. Grosse-Kunstleve_