A005495 - OEIS

A005495

Number of triangulations of the disk G_{n,3}.
(Formerly M3529)

4, 16, 88, 538, 3568, 24596, 176354, 1298732, 9788838, 75190990, 586994548, 4646450800, 37225608048, 301400446752, 2463161448024, 20297411421166, 168503717726980, 1408243135178256, 11840473621942108, 100102553809842544

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

REFERENCES

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

LINKS

Table of n, a(n) for n=0..19.

William G. Brown, Enumeration of Triangulations of the Disk, Proc. Lond. Math. Soc. s3-14 (1964) 746-768.

MAPLE

A005495 := proc(n) # see A210696

BrownG(n, 3) ;

end proc:

seq(A005495(n), n=0..25) ; # R. J. Mathar, Mar 30 2012

MATHEMATICA

(* See A210696 for BrownG[n, m] *)

a[n_] := BrownG[n, 3];

Table[a[n], {n, 0, 25}] (* Jean-François Alcover, Apr 25 2023 *)

CROSSREFS

Sequence in context: A300279 A321238 A005618 * A052124 A235166 A013030

Adjacent sequences: A005492 A005493 A005494 * A005496 A005497 A005498

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved