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A173850 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 720
7 5040
8 40320
9 362880
10 3628800
11 32659200
12 399168000
13 4470681600
14 64186214400
15 855496857600
16 14073067008000
17 216999220838400
18 4018570511155200
19 70276861528473600
20 1445722935681024000
21 28251875803447296000
22 638889942904012800000

[1,1,2,6,24,120,720,5040,40320,362880,3628800,
 32659200,399168000,4470681600,64186214400,
 855496857600,14073067008000,216999220838400,
 4018570511155200,70276861528473600,
 1445722935681024000,28251875803447296000,
 638889942904012800000]

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Last modified January 28 13:05 EST 2020. Contains 331321 sequences. (Running on oeis4.)