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A009212 as a simple table

na(n)
01
11
23
39
433
5137
6619
73017
815617
984625
10474771
112723721
1215730209
1389487257
14482793211
152259370697
166292321025
17-41172399839
18-1066104760797
19-14517156416247
20-163539106749663
21-1652237279663959
22-15169567281615221

[1,1,3,9,33,137,619,3017,15617,84625,474771,
 2723721,15730209,89487257,482793211,2259370697,
 6292321025,-41172399839,-1066104760797,
 -14517156416247,-163539106749663,
 -1652237279663959,-15169567281615221]