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 A002711 M3916 N1609 #31 Jan 17 2025 10:47:00
%S A002711 1,5,21,119,735,4830,33253,237336,1743588,13114465,100591491,
%T A002711 784428522,6204258970,49675571820,402013608525,3284214703056,
%U A002711 27055525967324,224557688302164,1876374953765620,15774315150669075,133345566025874055,1132905339504465590,9669675838370401035
%N A002711 Triangulations of the disk G_{n,2}.
%D A002711 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D A002711 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A002711 Andrew Howroyd, <a href="/A002711/b002711.txt">Table of n, a(n) for n = 0..500</a>
%H A002711 William G. Brown, <a href="http://dx.doi.org/10.1112/plms/s3-14.4.746">Enumeration of Triangulations of the Disk</a>, Proc. Lond. Math. Soc. s3-14 (1964) 746-768.
%H A002711 William G. Brown, <a href="/A002709/a002709.pdf">Enumeration of Triangulations of the Disk</a>, Proc. Lond. Math. Soc. s3-14 (1964) 746-768. [Annotated scanned copy]
%p A002711 # see A210696
%Y A002711 Column k=2 of A262586.
%Y A002711 Cf. A210696.
%K A002711 nonn
%O A002711 0,2
%A A002711 _N. J. A. Sloane_
%E A002711 Extended by _Max Alekseyev_, Mar 30 2009
%E A002711 a(21) onwards from _Andrew Howroyd_, Nov 23 2024