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A056449 as a simple table

na(n)
01
13
23
39
49
527
627
781
881
9243
10243
11729
12729
132187
142187
156561
166561
1719683
1819683
1959049
2059049
21177147
22177147
23531441
24531441
251594323
261594323
274782969
284782969
2914348907
3014348907
3143046721
3243046721
33129140163
34129140163
35387420489
36387420489
371162261467

[1,3,3,9,9,27,27,81,81,243,243,729,729,2187,2187,
 6561,6561,19683,19683,59049,59049,177147,177147,
 531441,531441,1594323,1594323,4782969,4782969,
 14348907,14348907,43046721,43046721,129140163,
 129140163,387420489,387420489,1162261467]