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

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