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A209996 as a simple table

na(n)
11
21
33
41
55
69
71
85
921
1027
111
125
1325
1481
1581
161
175
1825
19117
20297
21243
221
235
2425
25125
26513
271053
28729
291
305
3125
32125
33609
342133
353645
362187
371
385
3925
40125
41625
422853
438505
4412393
456561
461
475
4825
49125
50625
513093
5212825
5332805
5441553
5519683
561
575
5825
59125

[1,1,3,1,5,9,1,5,21,27,1,5,25,81,81,1,5,25,117,
 297,243,1,5,25,125,513,1053,729,1,5,25,125,609,
 2133,3645,2187,1,5,25,125,625,2853,8505,12393,
 6561,1,5,25,125,625,3093,12825,32805,41553,19683,
 1,5,25,125]