id:A097556 - OEIS Search Results

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Number of positive words of length n in the monoid Br_9 of positive braids on 10 strands.

+0
7

1, 9, 56, 279, 1223, 4932, 18833, 69345, 249166, 880525, 3076295, 10662459, 36749785, 126161246, 431880044, 1475412473, 5032964258 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (1 + q^2)^4/(1-9q+32q^2-63q^3+84q^4-81q^5+56q^6-27q^7+8q^8-q^9). [This is not correct! - Matthew Conroy, Jan 16 2006]`
	CROSSREFS	`Cf. A097550-A097555.` `Sequence in context: A096191 A041148 A114026 this_sequence A002055 A026842 A026846` `Adjacent sequences: A097553 A097554 A097555 this_sequence A097557 A097558 A097559`
	KEYWORD	`nonn,more`
	AUTHOR	`D. N. Verma (dnverma(AT)math.tifr.res.in), Aug 16 2004`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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