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A009458 as a simple table

na(n)
00
10
22
3-6
418
5-60
6214
7-714
8984
923040
10-468880
117113040
12-102747560
131501609200
14-22698373400
15358125772200
16-5919450952000
17102619545932800
18-1865622384074400
1935539903321740000
20-708618759088892000
2114768814409403208000

[0,0,2,-6,18,-60,214,-714,984,23040,-468880,
 7113040,-102747560,1501609200,-22698373400,
 358125772200,-5919450952000,102619545932800,
 -1865622384074400,35539903321740000,
 -708618759088892000,14768814409403208000]