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A001490 as a simple table

na(n)
11
2-12
366
4-220
5483
6-660
7252
81320
9-4059
106644
11-6336
12240
1312255
14-27192
1535850
16-27972
17-2343
1850568
19-99286
20122496
21-96162
2211584
23115116
24-242616
25315216
26-283800
27128304
28126280
29-409398
30622644
31-671550
32501468
33-122508
34-382360

[1,-12,66,-220,483,-660,252,1320,-4059,6644,-6336,
 240,12255,-27192,35850,-27972,-2343,50568,-99286,
 122496,-96162,11584,115116,-242616,315216,-283800,
 128304,126280,-409398,622644,-671550,501468,
 -122508,-382360]