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A144028 as a simple table

na(n)
01
11
2-1
3-6
4-7
53
636
755
8-9
9-221
10-373
11-18
121290
132506
14643
15-7488
16-16487
17-7258
1842577
19106701
2065695
21-236923
22-681856
23-534130
241282512
254304675
264079414
27-6687222
28-26866199
29-29871373
3033019148
31165771711
32212092381
33-149113958
34-1010995614

[1,1,-1,-6,-7,3,36,55,-9,-221,-373,-18,1290,2506,
 643,-7488,-16487,-7258,42577,106701,65695,-236923,
 -681856,-534130,1282512,4304675,4079414,-6687222,
 -26866199,-29871373,33019148,165771711,212092381,
 -149113958,-1010995614]