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A009505 as a simple table

n a(n)
0 1
1 -2
2 -8
3 -184
4 -5568
5 -231552
6 -11751296
7 -596164352
8 -4342886400
9 10035384119296
10 3825733461393408
11 1266087931055144960
12 431690972162311487488
13 158346541732411570847744
14 63296242766270753646313472

[1,-2,-8,-184,-5568,-231552,-11751296,-596164352,
 -4342886400,10035384119296,3825733461393408,
 1266087931055144960,431690972162311487488,
 158346541732411570847744,
 63296242766270753646313472]

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Last modified October 16 23:51 EDT 2021. Contains 348048 sequences. (Running on oeis4.)