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A141413 as a simple table

na(n)
00
1-1
21
3-3
49
5-27
681
7-243
8729
9-2187
106561
11-19683
1259049
13-177147
14531441
15-1594323
164782969
17-14348907
1843046721
19-129140163
20387420489
21-1162261467
223486784401
23-10460353203
2431381059609
25-94143178827
26282429536481
27-847288609443

[0,-1,1,-3,9,-27,81,-243,729,-2187,6561,-19683,
 59049,-177147,531441,-1594323,4782969,-14348907,
 43046721,-129140163,387420489,-1162261467,
 3486784401,-10460353203,31381059609,-94143178827,
 282429536481,-847288609443]