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 A005495 M3529 #25 Apr 25 2023 13:12:51
%S A005495 4,16,88,538,3568,24596,176354,1298732,9788838,75190990,586994548,
%T A005495 4646450800,37225608048,301400446752,2463161448024,20297411421166,
%U A005495 168503717726980,1408243135178256,11840473621942108,100102553809842544
%N A005495 Number of triangulations of the disk G_{n,3}.
%D A005495 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A005495 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.
%p A005495 A005495 := proc(n) # see A210696
%p A005495 BrownG(n,3) ;
%p A005495 end proc:
%p A005495 seq(A005495(n),n=0..25) ; # _R. J. Mathar_, Mar 30 2012
%t A005495 (* See A210696 for BrownG[n,m] *)
%t A005495 a[n_] := BrownG[n, 3];
%t A005495 Table[a[n], {n, 0, 25}] (* _Jean-François Alcover_, Apr 25 2023 *)
%K A005495 nonn
%O A005495 0,1
%A A005495 _N. J. A. Sloane_