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A012107 as a simple table

n a(n)
0 1
1 4
2 84
3 4432
4 432144
5 67336512
6 15330202432
7 4799825862912
8 1978228668612864
9 1038257514383795200
10 676117122084133770240
11 534973800492211106598912
12 505535479689176978173726720 

[1,4,84,4432,432144,67336512,15330202432,
 4799825862912,1978228668612864,
 1038257514383795200,676117122084133770240,
 534973800492211106598912,
 505535479689176978173726720]

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Last modified March 28 20:24 EDT 2023. Contains 361596 sequences. (Running on oeis4.)