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A102559 as a simple table

n a(n)
1 4
2 8
3 20
4 560
5 560
6 440
7 7280
8 160160
9 2722720
10 51731680
11 51731680
12 45762640
13 1487285800
14 5949143200
15 86262576400
16 10696559473600
17 368846878400
18 562976814400
19 395772700523200
20 395772700523200
21 16226680721451200

[4,8,20,560,560,440,7280,160160,2722720,51731680,
 51731680,45762640,1487285800,5949143200,
 86262576400,10696559473600,368846878400,
 562976814400,395772700523200,395772700523200,
 16226680721451200]

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Last modified July 25 14:49 EDT 2021. Contains 346290 sequences. (Running on oeis4.)