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 A030044 #15 Feb 12 2022 13:34:42 %S A030044 1,0,6,76,1389,30608,769646,21242984,627520006 %N A030044 High temperature series in v^2 = tanh(J/kT)^2 for spin-1/2 Ising partition function on 4D simple cubic lattice, divided by 2/(1+v)^4. %D A030044 S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 391-406. %H A030044 Steven R. Finch, <a href="http://www.people.fas.harvard.edu/~sfinch/constant/ising/ising.html">Lenz-Ising Constants</a> [broken link] %H A030044 Steven R. Finch, <a href="http://web.archive.org/web/20010207201511/http://www.mathsoft.com:80/asolve/constant/ising/ising.html">Lenz-Ising Constants</a> [From the Wayback Machine] %H A030044 M. F. Sykes, <a href="https://doi.org/10.1088/0305-4470/12/6/019">Derivation of low-temperature expansions for Ising model, X: The four-dimensional simple hypercubic lattice</a>, J. Phys. A 12 (1979) 879-892. %Y A030044 Cf. A030045, A030047, A030048, A030049. %K A030044 nonn %O A030044 0,3 %A A030044 _Steven Finch_ %E A030044 "Free energy" corrected to "partition function" (basically the exponential of the free energy) in the name and more details given by _Andrey Zabolotskiy_, Feb 11 2022