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 A057388 #8 Mar 30 2012 16:48:52 %S A057388 108,0,0,0,900,2178,-3672,0,14112,27000,-18432,-114444,290628,467856, %T A057388 -354600,-1479114,1768536,12073896,-5861808,-29193750,22900176, %U A057388 165214728,64153152,-654007014,163350540,2795893038 %N A057388 Low-temperature specific heat expansion for hexagonal lattice (Potts model, q=4). %C A057388 The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice. %H A057388 I. Jensen, <a href="/A057388/b057388.txt">Table of n, a(n) for n = 0..54</a> (from link below) %H A057388 I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/potts/series/trp4sh.ser">More terms</a> %H A057388 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> %H A057388 <a href="/index/Sp#specific_heat">Index entries for sequences related to specific heat</a> %Y A057388 Cf. A057374-A057405. %K A057388 sign %O A057388 0,1 %A A057388 _N. J. A. Sloane_, Aug 30 2000