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 A006810 M2805 #17 May 12 2023 09:09:34 %S A006810 1,3,9,27,78,225,633,1785,4944,13742,37686,103767,282425,772719 %N A006810 Bond percolation series for mean cluster size on directed cubic lattice. %D A006810 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006810 J. Blease, <a href="https://doi.org/10.1088/0022-3719/10/7/003">Series expansions for the directed-bond percolation problem</a>, J. Phys C vol 10 no 7 (1977), 917-924. %H A006810 K. De'Bell and J. W. Essam, <a href="https://doi.org/10.1088/0305-4470/16/15/020">Directed percolation: series expansion for some three-dimensional lattices</a>, J. Phys. A: Math. Gen., 16 (1983), 3553-3560. %Y A006810 Cf. different directed lattices: A006727 (square), A006809 (hexagonal), A006813 (hexagonal cyclic), A006811 (b.c.c.), A006812 (f.c.c.). %Y A006810 Cf. A006804 (percolation probability). %K A006810 nonn,more %O A006810 0,2 %A A006810 _N. J. A. Sloane_ %E A006810 Name clarified and terms a(0), a(9)-a(13) added from De'Bell & Essam by _Andrey Zabolotskiy_, May 11 2023