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 A080691 #22 Feb 16 2025 08:32:48 %S A080691 1,15,3102,8790016,341008617408,181075508242067552, %T A080691 1315927389374152034113856,130877523274817580209987036404864, %U A080691 178135975585132088643635627145305047963624,3318089946193080260596185780557019330240985991363200,845810281460839114896541390288164525407725177643901666416522016 %N A080691 Number of spanning forests of the n X n grid graph. %H A080691 Andrew Howroyd, <a href="/A080691/b080691.txt">Table of n, a(n) for n = 1..15</a> %H A080691 N. Calkin, C. Merino, S. Noble and M. Noy, <a href="http://www.combinatorics.org/ojs/index.php/eljc/article/view/v10i1r4">Improved Bounds for the Number of Forests and Acyclic Orientations in the Square Lattice</a>, The Electronic Journal of Combinatorics, Volume 10(1), 2003, #R4. %H A080691 A. Pönitz, <a href="https://tubaf.qucosa.de/api/qucosa%3A22459/attachment/ATT-0/">Über eine Methode zur Konstruktion von Algorithmen für die Berechnung von Invarianten in endlichen ungerichteten Hypergraphen</a>, PhD Thesis (2004) C.3. %H A080691 Peter Tittmann, <a href="https://web.archive.org/web/20070715034048/http://www.htwm.de/~peter/research/enumeration.html">More Results</a> [Gives a(1)-a(14)] %H A080691 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GridGraph.html">Grid Graph</a> %Y A080691 Main diagonal of A360194. %Y A080691 Cf. A007341, A080690. %K A080691 nonn %O A080691 1,2 %A A080691 Andre Poenitz [André Pönitz], _Peter Tittmann_, Mar 03 2003 %E A080691 Terms a(10) and beyond from _Andrew Howroyd_, Feb 22 2023