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A115406 as a simple table

na(n)
11
23
35
42
52
63
73
87
99
104
1111
124
135
1413
155
164
174
1815
195
205
2117
2219
236
2421
2523
266
2725
2827
2929
3031
317
3233
3335
347
3537
366
3739
386
3941
4043
4145
426
436
447
4547
467
4749

[1,3,5,2,2,3,3,7,9,4,11,4,5,13,5,4,4,15,5,5,17,19,
 6,21,23,6,25,27,29,31,7,33,35,7,37,6,39,6,41,43,
 45,6,6,7,47,7,49]