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A147732 as a simple table

n a(n)
1 1
2 2
3 6
4 24
5 120
6 624
7 4176
8 32620
9 284384
10 2803702
11 29664334
12 339061272
13 4391825384
14 58843870478
15 866121264934

[1,2,6,24,120,624,4176,32620,284384,2803702,
 29664334,339061272,4391825384,58843870478,
 866121264934]

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Last modified January 23 17:33 EST 2022. Contains 350514 sequences. (Running on oeis4.)