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A337166 as a simple table

na(n)
01
10
2-1
3-1
417
599
6-926
7-20385
825969
97206059
1090298826
11-3271747557
12-149187119280
13236884125841
14233237751740057
157110791842650002
16-293292401726383791
17-32980038867059802549
18-498084376275585698222
19114298048468067933019627
209072219653673352772098960

[1,0,-1,-1,17,99,-926,-20385,25969,7206059,
 90298826,-3271747557,-149187119280,236884125841,
 233237751740057,7110791842650002,
 -293292401726383791,-32980038867059802549,
 -498084376275585698222,114298048468067933019627,
 9072219653673352772098960]