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A005504 Triangulations.
(Formerly M3846)
1
1, 5, 14, 53, 178, 685, 2548, 9876, 37950, 147520, 572594, 2230735, 8693932 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Graphs can be enumerated and counted using the tool "plantri", in particular the command "./plantri -s -P[n] -c2m2 [n+2]". - Manfred Scheucher, Mar 08 2018

REFERENCES

C. F. Earl and L. J. March, Architectural applications of graph theory, pp. 327-355 of R. J. Wilson and L. W. Beineke, editors, Applications of Graph Theory. Academic Press, NY, 1979.

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..12.

G. Brinkmann and B. McKay, Plantri (program for generation of certain types of planar graph)

C. F. Earl and L. J. March, Architectural applications of graph theory, pp. 327-355 of R. J. Wilson and L. W. Beineke, editors, Applications of Graph Theory. Academic Press, NY, 1979. (Annotated scanned copy)

C. F. Earl & N. J. A. Sloane, Correspondence, 1980-1981

CROSSREFS

A row or column of the array in A169808.

Sequence in context: A091218 A197601 A133751 * A146746 A073541 A268887

Adjacent sequences:  A005501 A005502 A005503 * A005505 A005506 A005507

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane

EXTENSIONS

a(6)-a(12) from Manfred Scheucher, Mar 08 2018

STATUS

approved

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Last modified March 18 16:00 EDT 2019. Contains 321292 sequences. (Running on oeis4.)