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A005806 Comparative probability orderings on n elements.
(Formerly M2072)
2
1, 1, 2, 14, 546, 169444, 560043206 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

T. Fine and J. Gill, Comparative probability relations, Ann. Prob. 4 (1976) 667-673.

D. Maclagan, Boolean Term Orders and the Root System B_n, Order 15 (1999), 279-295.

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=1..7.

D. Maclagan, [math/9809134] Boolean Term Orders and the Root System B_n

EXAMPLE

For n=3, the two orders are 1 < 2 < 12 < 3 < 13 < 23 < 123 and 1 < 2 < 3 < 12 < 13 < 23 < 123.

CROSSREFS

Cf. A009997.

Sequence in context: A277134 A009997 A048137 * A015184 A012002 A012005

Adjacent sequences:  A005803 A005804 A005805 * A005807 A005808 A005809

KEYWORD

hard,nice,nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

a(7) from Diane Maclagan and Michael Kleber

STATUS

approved

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Last modified January 18 20:57 EST 2019. Contains 319282 sequences. (Running on oeis4.)