

A005505


Triangulations of the disk K_{n,1}.
(Formerly M1227)


2



1, 2, 4, 10, 29, 86, 266, 844, 2742, 9032, 30202, 101988, 347914
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,2


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..12.
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


FORMULA

a(n) = 2 * A005500(n)  A002710(n) (based on Max Alekseyev's formula, cf. A005500).


CROSSREFS

A row or column of the array in A169809.
Sequence in context: A224845 A148113 A243814 * A262592 A187255 A148114
Adjacent sequences: A005502 A005503 A005504 * A005506 A005507 A005508


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane


EXTENSIONS

a(7)a(12) from Altug Alkan and Manfred Scheucher, Mar 08 2018


STATUS

approved



