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 A003036 M0223 #21 Nov 15 2023 06:02:37 %S A003036 1,1,1,2,2,2,2,4,2,4,5,5,6 %N A003036 Number of simplicial arrangements of n lines in the plane (the lines do not pass through a common point, all cells are triangles). %D A003036 J. E. Goodman and J. O'Rourke, editors, Handbook of Discrete and Computational Geometry, CRC Press, 1997, p. 102. %D A003036 B. Grünbaum, Arrangements and Spreads. American Mathematical Society, Providence, RI, 1972, p. 7. %D A003036 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A003036 Stefan Felsner and Jacob E. Goodman, <a href="https://www.csun.edu/~ctoth/Handbook/chap5.pdf">Pseudoline Arrangements</a>, Chapter 5 of Handbook of Discrete and Computational Geometry, CRC Press, 2017, see Table 5.6.1. [Specific reference for this sequence] - _N. J. A. Sloane_, Nov 14 2023 %H A003036 Jacob E. Goodman, Joseph O'Rourke, and Csaba D. Tóth, editors, <a href="https://www.csun.edu/~ctoth/Handbook/HDCG3.html">Handbook of Discrete and Computational Geometry</a>, CRC Press, 2017, see Table 5.6.1. [General reference for 2017 edition of the Handbook] - _N. J. A. Sloane_, Nov 14 2023 %Y A003036 Cf. A048872, A048873. %K A003036 nonn,nice,more %O A003036 3,4 %A A003036 _N. J. A. Sloane_