id:A104255 - OEIS Search Results

Search: id:A104255

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[ (2n-1)!!/(2n) ].

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0, 0, 2, 13, 94, 866, 9652, 126689, 1914412, 32736453, 624968662, 13176422634, 304071291562, 7623501667031, 206342778454312, 5996836998828457, 186254702081260312, 6156752652130549218, 215810382437839251562 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Asymptotic estimate for A007769(n).`
	LINKS	`A. Khruzin, Enumeration of chord diagrams`
	CROSSREFS	`Sequence in context: A126035 A074617 A140636 this_sequence A118352 A074614 A064325` `Adjacent sequences: A104252 A104253 A104254 this_sequence A104256 A104257 A104258`
	KEYWORD	`nonn`
	AUTHOR	`Ralf Stephan, Mar 02 2005`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.

AT&T Labs Research