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A050538 as a simple table

na(n)
13
29
311
417
523
635
739
875
9105
10107
11155
12161
13215
14225
15335
16635
17651
18687
191479
201515
211953
222435
232963
243671
255979
267551
278091
289791
2915015
3020897
3126279
3243371
33130407
34587585
35716769
36942563

[3,9,11,17,23,35,39,75,105,107,155,161,215,225,
 335,635,651,687,1479,1515,1953,2435,2963,3671,
 5979,7551,8091,9791,15015,20897,26279,43371,
 130407,587585,716769,942563]