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A013515
as a simple table
n
a(n)
0
1
1
-12
2
1568
3
6840768
4
-41485549312
5
-616649036623872
6
51689032519042469888
7
309411873154808535072768
[1,-12,1568,6840768,-41485549312,-616649036623872, 51689032519042469888,309411873154808535072768]
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Last modified May 7 08:46 EDT 2024. Contains 372300 sequences. (Running on oeis4.)