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A374341
as a simple table
n
a(n)
0
1
1
1
2
-3
3
15
4
259
5
1608
6
1582152
7
157042600
8
11778545664
9
3336975844504
10
440384712302421
[1,1,-3,15,259,1608,1582152,157042600,11778545664, 3336975844504,440384712302421]