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A223941
as a simple table
n
a(n)
1
420
2
55440
3
2042040
4
23931600
5
75698280
6
142334216640
7
1877686881840
8
185643608470320
9
2137147184560080
[420,55440,2042040,23931600,75698280,142334216640, 1877686881840,185643608470320,2137147184560080]
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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)