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A228932 as a simple table

na(n)
12
29
330
460
5122
6-878
711429
835241
9-177141
10709582
11-3123032
12-1157723745
133237738813
14-16178936725
1533395053634
16-71863018424
17-153349368674
18-386763022623
19-8021033029400
2016314606875900
2152522689388692

[2,9,30,60,122,-878,11429,35241,-177141,709582,
 -3123032,-1157723745,3237738813,-16178936725,
 33395053634,-71863018424,-153349368674,
 -386763022623,-8021033029400,16314606875900,
 52522689388692]