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A174945 as a simple table

na(n)
01
11
21
31
4-21
51
61
7-1173
8-1173
91
101
11-70521
12-72353
13-70521
141
151
16-6531789
17-6649565
18-6649565
19-6531789
201
211
22-878169537
23-889384022
24-889565551
25-889384022
26-878169537
271
281
29-161902540725
30-163440762800
31-163459004566

[1,1,1,1,-21,1,1,-1173,-1173,1,1,-70521,-72353,
 -70521,1,1,-6531789,-6649565,-6649565,-6531789,1,
 1,-878169537,-889384022,-889565551,-889384022,
 -878169537,1,1,-161902540725,-163440762800,
 -163459004566]