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 A066546 #11 Jul 08 2025 22:25:20 %S A066546 4,5976745079881894723584, %T A066546 22561207271999971793667241231967232556265564782280146786713600000000, %U A066546 7757960313423917565831233144393761302830112940189177166113578796780294097560917685262512568386612793431012933632000000000000000000000000 %N A066546 Number of spanning trees in the line graph of the box product of two (2 x n) grid graphs. %H A066546 Sean A. Irvine, <a href="/A066546/b066546.txt">Table of n, a(n) for n = 1..6</a> %t A066546 NumberOfSpanningTrees[LineGraph[GraphProduct[GridGraph[2, n], GridGraph[2, n]]]] (* First load package DiscreteMath`Combinatorica` *) %K A066546 nonn %O A066546 1,1 %A A066546 _Roberto E. Martinez II_, Jan 07 2002 %E A066546 Edited by _Dean Hickerson_, Jan 14 2002 %E A066546 More terms from _Sean A. Irvine_, Jul 08 2025