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A013159 as a simple table

na(n)
00
12
2-1
3-12
442
5436
6-4170
7-32704
8751016
93283072
10-209162880
1186913024
1281648502848
13-575015877024
14-41409311392176
15689874309603456
1625412078270229120
17-812967446932685568
18-17148064731893670528

[0,2,-1,-12,42,436,-4170,-32704,751016,3283072,
 -209162880,86913024,81648502848,-575015877024,
 -41409311392176,689874309603456,25412078270229120,
 -812967446932685568,-17148064731893670528]