

A005503


Triangulations.
(Formerly M1248)


1



1, 2, 4, 11, 28, 91, 291, 1004, 3471, 12350, 44114, 159519, 579835, 2121845, 7800702
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OFFSET

0,2


COMMENTS

Graphs can be enumerated and counted using the tool "plantri", in particular the command "./plantri s P[n] c2m2 [n+1]".  Manfred Scheucher, Mar 08 2018


REFERENCES

C. F. Earl and L. J. March, Architectural applications of graph theory, pp. 327355 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..14.
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. 327355 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, 19801981


CROSSREFS

A row or column of the array in A169808.
Sequence in context: A148136 A148137 A148138 * A148139 A061860 A093960
Adjacent sequences: A005500 A005501 A005502 * A005504 A005505 A005506


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane


EXTENSIONS

a(6) corrected and a(7)a(14) from Manfred Scheucher, Mar 08 2018


STATUS

approved



