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 A107965 #12 Jun 13 2015 00:51:50 %S A107965 1,33,421,3171,16954,71148,249228,758934,2066559,5135845,11828817, %T A107965 25546885,52216164,101751664,190171248,342572508,597234429,1011161361, %U A107965 1667449861,2684929863,4230610846,6535551660,9914869900,14792713650,21733135515,31477936581 %N A107965 a(n) = (n+1)(n+2)^2*(n+3)^2*(n+4)(11n^4 + 110n^3 + 439n^2 + 820n + 600)/86400. %C A107965 Kekulé numbers for certain benzenoids. %D A107965 S. J. Cyvin and I. Gutman, Kekulé structures in benzenoid hydrocarbons, Lecture Notes in Chemistry, No. 46, Springer, New York, 1988 (p. 229). %H A107965 T. D. Noe, <a href="/A107965/b107965.txt">Table of n, a(n) for n = 0..1000</a> %H A107965 <a href="/index/Rec#order_11">Index entries for linear recurrences with constant coefficients</a>, signature (11,-55,165,-330,462,-462,330,-165,55,-11,1). %F A107965 G.f.: -(x^6+22*x^5+113*x^4+190*x^3+113*x^2+22*x+1) / (x-1)^11. - _Colin Barker_, Aug 13 2013 %p A107965 a:=n->(1/86400)*(n+1)*(n+2)^2*(n+3)^2*(n+4)*(11*n^4+110*n^3+439*n^2+820*n+600): seq(a(n),n=0..26); %K A107965 nonn,easy %O A107965 0,2 %A A107965 _Emeric Deutsch_, Jun 12 2005