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A141028 as a simple table

na(n)
11
22
3-1
49
5-6
61
7125
8-75
915
10-1
112401
12-1372
13294
14-28
151
16161051
17-73205
1813310
19-1210
2055
21-1
224826809
23-2227758
24428415
25-43940
262535
27-78
281
29410338673
30-168962983
3129816997
32-2923235
33171955
34-6069
35119
36-1
3716983563041
38-7150973912
391317284668
40-138661544
419122470
42-384104

[1,2,-1,9,-6,1,125,-75,15,-1,2401,-1372,294,-28,1,
 161051,-73205,13310,-1210,55,-1,4826809,-2227758,
 428415,-43940,2535,-78,1,410338673,-168962983,
 29816997,-2923235,171955,-6069,119,-1,16983563041,
 -7150973912,1317284668,-138661544,9122470,-384104]