id:A000776 - OEIS Search Results

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n! * (1 + 2*Sum[k=1...n, 1/k]).

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1, 3, 8, 28, 124, 668, 4248, 31176, 259488, 2416032, 24886080, 281004480, 3451887360, 45832538880, 654109585920, 9986000371200, 162391354675200, 2802498609254400, 51156349822771200, 984775394044108800 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`J. R. Stembridge, Some combinatorial aspects of reduced words in finite Coxeter groups. Trans. Amer. Math. Soc. 349 (1997), no. 4, 1285-1332.`
	LINKS	`INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 140`
	FORMULA	`E.g.f.: 1/(1-x) + ln(1-x)^2.`
	CROSSREFS	`Equals 2*A000265 + n!.` `Sequence in context: A093356 A135583 A009437 this_sequence A000239 A060707 A080874` `Adjacent sequences: A000773 A000774 A000775 this_sequence A000777 A000778 A000779`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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