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A308850 as a simple table

na(n)
01
1-3
28
3-17
418
558
6-364
7369
86194
9-37382
10-28848
111717274
12-8592644
13-47472804
14918146560
15-2911313551
16-61122074382
17806675821162
1846813084592
19-105331573943466
201018198168087636
216417696715221572
22-247555432672498872
231535509971584425358
2434028097257000628028
25-764203552200012087252

[1,-3,8,-17,18,58,-364,369,6194,-37382,-28848,
 1717274,-8592644,-47472804,918146560,-2911313551,
 -61122074382,806675821162,46813084592,
 -105331573943466,1018198168087636,
 6417696715221572,-247555432672498872,
 1535509971584425358,34028097257000628028,
 -764203552200012087252]