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 A126877 #23 Jun 17 2020 11:30:32 %S A126877 1,2,8,19,54,130,334,804,1984,4777,11615,27957,67472,162276,390546 %N A126877 Numbers of unstrained alkane staggered conformers (acyclic) of the unbranched type for point group C1. See Table 4 of the Cyvin et al. reference for precise definition. %C A126877 For an explanation of the various symmetry groups in Table 4 (p. 131) of the paper by Cyvin et al. (1998), see the wikipedia links. %H A126877 S. J. Cyvin, B. N. Cyvin, J. Brunvoll, and J. Wang, <a href="https://doi.org/10.1016/S0022-2860(97)00419-5">Enumeration of staggered conformers of alkanes and monocyclic cycloalkanes</a>, J. Molec. Struct., 445 (1998), 127-137. %H A126877 Wikipedia, <a href="https://en.wikipedia.org/wiki/Molecular_symmetry">Molecular symmetry</a> %H A126877 Wikipedia, <a href="https://en.wikipedia.org/wiki/Point_group">Point group</a> %Y A126877 Cf. A107769. %K A126877 nonn %O A126877 5,2 %A A126877 _N. J. A. Sloane_, Mar 17 2007