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A129769 as a simple table

na(n)
11
21
35
41
55
67
711
81
94
105
117
128
1311
141
155
167
179
1811
1913
2017
211
226
239
2411
2513
2615
2717
2819
291
307
3111
3213
3317
3419
3523
3629
371
3811
3917
4019
4123
4229
4331
4451
4555

[1,1,5,1,5,7,11,1,4,5,7,8,11,1,5,7,9,11,13,17,1,6,
 9,11,13,15,17,19,1,7,11,13,17,19,23,29,1,11,17,19,
 23,29,31,51,55]