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A004124 as a simple table

na(n)
11
21
3-3
4-4
5125
6-3
7-16807
8256
9-19683
10125
11-2357947691
12144
131792160394037
14-16807
151265625
1616777216
172862423051509815793
18-19683
19-5480386857784802185939
204000000
21205924456521
22-2357947691
23-39471584120695485887249589623
245308416

[1,1,-3,-4,125,-3,-16807,256,-19683,125,
 -2357947691,144,1792160394037,-16807,1265625,
 16777216,2862423051509815793,-19683,
 -5480386857784802185939,4000000,205924456521,
 -2357947691,-39471584120695485887249589623,
 5308416]