|
|
A005027
|
|
Number of trivalent maps with n nodes.
(Formerly M1294)
|
|
4
|
|
|
1, 2, 4, 16, 63, 328, 1933, 12633, 87466, 633015, 4717745, 35980100, 279418926, 2202903618, 17590599410, 142025760202, 1157868883224, 9520828261067, 78888071847324, 658158709983945, 5525145717439001, 46644670326913204, 395812792437224022, 3374572617006946447
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
3,2
|
|
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
|
|
|
FORMULA
|
|
|
PROG
|
(PARI) \\ See link in A169808 for script.
|
|
CROSSREFS
|
Antidiagonal sums of array in A169808.
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
a(10) corrected and terms a(11) and beyond from Andrew Howroyd, Feb 22 2021
|
|
STATUS
|
approved
|
|
|
|