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A193477
Denominator(n!/floor(n/2)!^4).
2
1, 1, 1, 1, 2, 2, 9, 9, 288, 32, 400, 400, 43200, 43200, 1058400, 70560, 18063360, 18063360, 6584094720, 6584094720, 3292047360000, 156764160000, 9484231680000, 9484231680000, 8194376171520000, 327775046860800, 27696991459737600, 1025814498508800
OFFSET
0,5
FORMULA
a(n) = Denominator(A056040(n)^2/n!).
a(n) = Denominator(A056040(n)/floor(n/2)!^2).
MAPLE
A193477 := n -> denom(n!/iquo(n, 2)!^4);
CROSSREFS
Cf. A055773.
Sequence in context: A229594 A059199 A010765 * A193726 A143022 A154100
KEYWORD
nonn
AUTHOR
Peter Luschny, Jul 30 2011
STATUS
approved