A005498 - OEIS

%I M4146 #36 Oct 27 2023 08:23:56

%S 1,6,21,88,330,1302,5005,19504,75582,294140,1144066,4458192,17383860,

%T 67866918,265182525,1037169760,4059928950,15905412468,62359143990,

%U 244662838160,960566918220,3773656396796,14833897694226,58343359313568,229591913401900

%N Triangulations of the disk G_{2,n}.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H Jean-François Alcover, <a href="/A005498/a005498.txt">Mathematica program</a>

%H 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 W. 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 A005498 := proc(n)

%p         BrownG(2,n) ;

%p end proc:  # take BrownG from A210696

%p seq(A005498(n),n=0..25) ; # _R. J. Mathar_, Mar 30 2012

%t (* See links *)

%Y A row or column of the array in A262586.

%K nonn

%O 0,2

%A _N. J. A. Sloane_

%E More terms from _R. J. Mathar_, Mar 30 2012