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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. 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.

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

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

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Last modified February 16 14:47 EST 2019. Contains 320163 sequences. (Running on oeis4.)