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A001755 as a simple table

n a(n)
4 1
5 20
6 300
7 4200
8 58800
9 846720
10 12700800
11 199584000
12 3293136000
13 57081024000
14 1038874636800
15 19833061248000
16 396661224960000
17 8299373322240000
18 181400588328960000
19 4135933413900288000
20 98228418580131840000
21 2426819753156198400000
22 62288373664342425600000

[1,20,300,4200,58800,846720,12700800,199584000,
 3293136000,57081024000,1038874636800,
 19833061248000,396661224960000,8299373322240000,
 181400588328960000,4135933413900288000,
 98228418580131840000,2426819753156198400000,
 62288373664342425600000]

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)