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A374647
a(n) = n! / floor(2n/3)!.
0
1, 1, 2, 3, 12, 20, 30, 210, 336, 504, 5040, 7920, 11880, 154440, 240240, 360360, 5765760, 8910720, 13366080, 253955520, 390700800, 586051200, 12893126400, 19769460480, 29654190720, 741354768000, 1133836704000, 1700755056000, 47621141568000, 72684900288000
OFFSET
0,3
MATHEMATICA
Table[n!/(Floor[2 n/3]!), {n, 0, 30}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jul 22 2024
STATUS
approved