A289747 - OEIS

A289747

Number of round-robin tournament schedules with 2*n participants.

1, 6, 720, 120960, 2264371200, 48920701648896000, 1570969121006520000000000000 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..7.`
	FORMULA	`a(n) = A000438(n) * (2n-1)!.`
	CROSSREFS	`Cf. A000438, A009445.` `Sequence in context: A201391 A289367 A014525 * A188960 A100732 A003923` `Adjacent sequences: A289744 A289745 A289746 * A289748 A289749 A289750`
	KEYWORD	`nonn,more`
	AUTHOR	`Alexander Karpov, Jul 11 2017`
	STATUS	`approved`

Last modified August 11 10:15 EDT 2022. Contains 356065 sequences. (Running on oeis4.)