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A012025 as a simple table

n a(n)
1 1
2 -4
3 84
4 -4320
5 418320
6 -66225600
7 15657364800
8 -5187108326400
9 2296766568096000
10 -1310785979158656000
11 937056917610253440000
12 -820081468493365478400000
13 862301491174096979765760000

[1,-4,84,-4320,418320,-66225600,15657364800,
 -5187108326400,2296766568096000,
 -1310785979158656000,937056917610253440000,
 -820081468493365478400000,
 862301491174096979765760000]

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Last modified February 2 19:34 EST 2023. Contains 360024 sequences. (Running on oeis4.)