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A141609 as a simple table

n a(n)
1 1
2 1
3 1
4 2
5 6
6 48
7 1296
8 290304
9 1763596800
10 2400297571123200
11 19846204885558066176000000
12 223334408639880528216369404299444224000000
13 20780031060559302184531906881808103844643569442380668928000000000000

[1,1,1,2,6,48,1296,290304,1763596800,
 2400297571123200,19846204885558066176000000,
 223334408639880528216369404299444224000000,
 20780031060559302184531906881808103844643569442380\
 668928000000000000]

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Last modified April 3 17:03 EDT 2020. Contains 333197 sequences. (Running on oeis4.)