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 A055904 #6 Aug 16 2021 14:54:28 %S A055904 1,17,181,1361,8107,40187,172207,653921,2243296,7053912,20568960, %T A055904 56141388,144540144,353269224,824102928,1843357923,3969216603, %U A055904 8255612079,16635486439,32560881353,62048339353,115351334813 %N A055904 Column 8 of triangle A055898. %H A055904 A. J. Guttmann, <a href="https://doi.org/10.1016/S0012-365X(99)00262-9">Indicators of solvability for lattice models</a>, Discrete Math., 217 (2000), 167-189 (H_8 for square lattices of Section 6). %Y A055904 Cf. A055898. %K A055904 nonn %O A055904 8,2 %A A055904 _Christian G. Bower_, Jun 13 2000