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A012841 as a simple table

n a(n)
0 1
1 4
2 20
3 -1024
4 -147568
5 -19148736
6 -2934842560
7 -551525234688
8 -127249126657792
9 -35789287036394496
10 -12158191126869847040
11 -4941201795126314303488
12 -2379230211581147229286400

[1,4,20,-1024,-147568,-19148736,-2934842560,
 -551525234688,-127249126657792,-35789287036394496,
 -12158191126869847040,-4941201795126314303488,
 -2379230211581147229286400]

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Last modified July 25 15:41 EDT 2024. Contains 374612 sequences. (Running on oeis4.)