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 A007215 M3346 #11 Nov 16 2017 15:34:49 %S A007215 1,0,4,8,39,152,672,3016,13989,66664 %N A007215 Low temperature antiferromagnetic susceptibility for square lattice. %D A007215 C. Domb, Ising model, in Phase Transitions and Critical Phenomena, vol. 3, ed. C. Domb and M. S. Green, Academic Press, 1974; p. 421. %D A007215 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A007215 C. Domb, <a href="/A007239/a007239.pdf">Ising model</a>, Phase Transitions and Critical Phenomena 3 (1974), 257, 380-381, 384-387, 390-391, 412-423. (Annotated scanned copy) %K A007215 nonn,more %O A007215 0,3 %A A007215 _Simon Plouffe_