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 A057386 #7 Mar 30 2012 16:48:52 %S A057386 1,0,0,0,0,0,-4,0,0,0,-24,-48,60,0,-300,-480,144,1392,-4392,-7248, %T A057386 2904,13280,-27348,-142512,29948,241872,-336072,-1711936,-950268, %U A057386 4759680,-2790212,-25599600,-17648472,53777216,24551472,-385317888 %N A057386 Low-temperature magnetization expansion for hexagonal lattice (Potts model, q=4). %C A057386 The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice. %H A057386 I. Jensen, <a href="/A057386/b057386.txt">Table of n, a(n) for n = 0..60</a> (from link below) %H A057386 I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/potts/series/trp4mag.ser">More terms</a> %H A057386 G. Nebe and N. J. A. Sloane, <a href="http://www.math.rwth-aachen.de/~Gabriele.Nebe/LATTICES/A2.html">Home page for hexagonal (or triangular) lattice A2</a> %Y A057386 Cf. A057374-A057405. %K A057386 sign %O A057386 0,7 %A A057386 _N. J. A. Sloane_, Aug 30 2000