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A289747 Number of round-robin tournament schedules with 2*n participants. 0
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

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