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A002869 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 36
5 240
6 1800
7 16800
8 191520
9 2328480
10 30240000
11 479001600
12 8083152000
13 142702560000
14 2731586457600
15 59056027430400
16 1320663933388800
17 30575780537702400
18 783699448602470400
19 21234672840116736000
20 591499300737945600000

[1,1,2,6,36,240,1800,16800,191520,2328480,
 30240000,479001600,8083152000,142702560000,
 2731586457600,59056027430400,1320663933388800,
 30575780537702400,783699448602470400,
 21234672840116736000,591499300737945600000]

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Last modified December 9 17:18 EST 2019. Contains 329879 sequences. (Running on oeis4.)