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A009053 as a simple table

na(n)
01
10
2-1
33
4-14
580
6-526
73906
8-32192
9290016
10-2816056
1129050120
12-313052024
133442154352
14-37060529416
15353733158520
16-1866295941824
17-42066299646976
182247562825065152
19-73960387213018176
202159580310527713536

[1,0,-1,3,-14,80,-526,3906,-32192,290016,-2816056,
 29050120,-313052024,3442154352,-37060529416,
 353733158520,-1866295941824,-42066299646976,
 2247562825065152,-73960387213018176,
 2159580310527713536]