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A045689 as a simple table

n a(n)
0 1
1 1
2 1
3 30
4 756
5 75600
6 7392
7 54486432000
8 4358914560
9 1905468364800
10 7602818775552000
11 6690480522485760000
12 4616431560515174400000
13 226851446883715670016000000
14 127036810254880775208960000
15 2210440498434925488635904000000
16 646080179971122507107008512000000

[1,1,1,30,756,75600,7392,54486432000,4358914560,
 1905468364800,7602818775552000,
 6690480522485760000,4616431560515174400000,
 226851446883715670016000000,
 127036810254880775208960000,
 2210440498434925488635904000000,
 646080179971122507107008512000000]

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Last modified April 20 00:58 EDT 2024. Contains 371798 sequences. (Running on oeis4.)