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 A057397 #5 Mar 30 2012 16:48:52 %S A057397 1,0,0,6,9,36,99,342,1188,4314,16308,61362,244344,969480,3990681, %T A057397 16401402,69105645,292097790,1254450831,5412716802,23608046241, %U A057397 103512674946,457382482686,2031136391286,9072992530731 %N A057397 Low-temperature partition function expansion for honeycomb net (Potts model, q=4). %H A057397 I. Jensen, <a href="/A057397/b057397.txt">Table of n, a(n) for n = 0..30</a> (from link below) %H A057397 I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/potts/series/hcp4pf.ser">More terms</a> %Y A057397 Cf. A057374-A057405. %K A057397 nonn %O A057397 0,4 %A A057397 _N. J. A. Sloane_, Aug 30 2000