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A120725 as a simple table

na(n)
12
23
39
45
511
635
77
813
937
1011
1117
1241
1395
1413
1519
1643
1797
1817
1923
2047
21101
22197
2319
2425
2549
26103
27199
2823
2929
3053
31107
32203
3329
3435
3559
36113
37209

[2,3,9,5,11,35,7,13,37,11,17,41,95,13,19,43,97,17,
 23,47,101,197,19,25,49,103,199,23,29,53,107,203,
 29,35,59,113,209]