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 A192418 #66 Feb 16 2025 08:33:15
%S A192418 4,48,180,448,900,1584,2548,3840,5508,7600,10164,13248,16900,21168,
%T A192418 26100,31744,38148,45360,53428,62400,72324,83248,95220,108288,122500,
%U A192418 137904,154548,172480,191748,212400
%N A192418 Molecular topological indices of the complete bipartite graphs K_{n,n}.
%H A192418 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CompleteBipartiteGraph.html">Complete Bipartite Graph</a>
%H A192418 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MolecularTopologicalIndex.html">Molecular Topological Index</a>
%H A192418 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (4,-6,4,-1).
%F A192418 a(n) = 4*n^2*(2*n-1).
%F A192418 a(n) = 4*A015237(n).
%F A192418 G.f.: 4*x*(3*x^2+8*x+1)/(x-1)^4. - _Colin Barker_, Nov 04 2012
%F A192418 a(n) = 2*n * A002939(n). - _Bruce J. Nicholson_, Oct 14 2019
%F A192418 E.g.f.: 4*exp(x)*x*(1 + 5*x + 2*x^2). - _Stefano Spezia_, Oct 15 2019
%t A192418 Table[4n^2(2n-1),{n,30}] (* or *) LinearRecurrence[{4,-6,4,-1},{4,48,180,448},30] (* _Harvey P. Dale_, Apr 08 2018 *)
%K A192418 nonn,easy
%O A192418 1,1
%A A192418 _Eric W. Weisstein_, Jul 10 2011