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A176863 as a simple table

na(n)
01
10
2-1
34
4-3
51
664
7-36
89
9-1
101296
11-650
12147
13-18
141
1532768
16-15440
173330
18-415
1930
20-1
211000000
22-452984
2395070
24-11915
25945
26-45
271
2835831808
29-15796032
303257240
31-409290
3233985
33-1869
3463
35-1
361475789056
37-637771728
38129899980

[1,0,-1,4,-3,1,64,-36,9,-1,1296,-650,147,-18,1,
 32768,-15440,3330,-415,30,-1,1000000,-452984,
 95070,-11915,945,-45,1,35831808,-15796032,3257240,
 -409290,33985,-1869,63,-1,1475789056,-637771728,
 129899980]