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Number of permutations of square-free monomials of degree n in n non-commutative variables that are compatible with a non-commutative monomial order (in the Groebner basis sense).

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1, 2, 132, 10132883443872 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`For example, when n=3, 132 of the (3!)!=720 possibile permutations of xyz,xzy,yxz,yzx,zxy,zyx are compatible with a monomial order.`
	CROSSREFS	`Sequence in context: A020524 A099682 A135759 this_sequence A097641 A065963 A000662` `Adjacent sequences: A014312 A014313 A014314 this_sequence A014316 A014317 A014318`
	KEYWORD	`nonn`
	AUTHOR	`Svante Linusson (linusson(AT)matematik.su.se)`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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