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A131270 as a simple table

na(n)
01
11
21
31
41
51
61
73
81
91
101
113
125
131
141
151
165
175
187
191
201
211
225
2311
247
259
261
271
281
297
3011
3119
329
3311
341
351
361
377
3819
3919
4029
4111
4213
431
441
451
469
4719
4839
4929
5041
5113
5215
531
541
551
569
5729
5839
5969
6041
6155
6215
6317
641
651
661
6711
6829
6969
7069
71111
7255
7371
7417
7519
761
771

[1,1,1,1,1,1,1,3,1,1,1,3,5,1,1,1,5,5,7,1,1,1,5,11,
 7,9,1,1,1,7,11,19,9,11,1,1,1,7,19,19,29,11,13,1,1,
 1,9,19,39,29,41,13,15,1,1,1,9,29,39,69,41,55,15,
 17,1,1,1,11,29,69,69,111,55,71,17,19,1,1]