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A078698 as a simple table

n a(n)
1 1
2 2
3 20
4 396
5 14976
6 907200
7 79315200
8 9551001600
9 1513528934400
10 305106949324800
11 76296489615360000
12 23175289163980800000
13 8404709419090575360000
14 3587225703492542791680000
15 1779970753996760560435200000
16 1016036270188884847558656000000
17 661106386935312429191528448000000 

[1,2,20,396,14976,907200,79315200,9551001600,
 1513528934400,305106949324800,76296489615360000,
 23175289163980800000,8404709419090575360000,
 3587225703492542791680000,
 1779970753996760560435200000,
 1016036270188884847558656000000,
 661106386935312429191528448000000]

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Last modified July 19 11:32 EDT 2024. Contains 374394 sequences. (Running on oeis4.)