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A147915 as a simple table

n a(n)
1 1
2 2
3 6
4 24
5 96
6 444
7 2508
8 13216
9 74772
10 490758
11 3432594
12 29784866
13 218746780
14 1711675050
15 14763495624
16 145575514096

[1,2,6,24,96,444,2508,13216,74772,490758,3432594,
 29784866,218746780,1711675050,14763495624,
 145575514096]

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Last modified July 4 16:26 EDT 2022. Contains 355081 sequences. (Running on oeis4.)