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A012921 as a simple table

n a(n)
0 1
1 4
2 16
3 184
4 8320
5 529824
6 52633728
7 7595502464
8 1487529832448
9 380497987834368
10 123182327672588288
11 49234752596303947776
12 23812565081465676070912
13 13707078729819239829938176 

[1,4,16,184,8320,529824,52633728,7595502464,
 1487529832448,380497987834368,123182327672588288,
 49234752596303947776,23812565081465676070912,
 13707078729819239829938176]

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Last modified May 21 07:02 EDT 2024. Contains 372729 sequences. (Running on oeis4.)