1,3

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).

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

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

Cf. A009997.

Sequence in context: A160710 A009997 A048137 this_sequence A015184 A012002 A012005

Adjacent sequences: A005803 A005804 A005805 this_sequence A005807 A005808 A005809

hard,nice,nonn

N. J. A. Sloane (njas(AT)research.att.com).

a(7) from Diane Maclagan and Michael Kleber (maclagan(AT)math.berkeley.edu, michael.kleber(AT)gmail.com)