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A012020 as a simple table

n a(n)
0 1
1 -4
2 76
3 -3256
4 245008
5 -28441216
6 4700478784
7 -1047088053376
8 302112622479616
9 -109527844826856448
10 48716214653800569856
11 -26075068739563056830464
12 16529214537740143196901376

[1,-4,76,-3256,245008,-28441216,4700478784,
 -1047088053376,302112622479616,
 -109527844826856448,48716214653800569856,
 -26075068739563056830464,
 16529214537740143196901376]

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)