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A350383 as a simple table

na(n)
01
1-1
21
32
4-15
549
6-98
748
8561
9-2860
108151
11-12948
12-9282
13149226
14-594320
151428952
16-1448655
17-5538975
1837450900
19-122995950
20239589735
21-37528755
22-1886983020
238939152560
24-24579514050
2535197176924
2651580335366
27-541312482256
282033695030128
29-4624358661240

[1,-1,1,2,-15,49,-98,48,561,-2860,8151,-12948,
 -9282,149226,-594320,1428952,-1448655,-5538975,
 37450900,-122995950,239589735,-37528755,
 -1886983020,8939152560,-24579514050,35197176924,
 51580335366,-541312482256,2033695030128,
 -4624358661240]