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A097524 as a simple table

na(n)
13
25
33
43
57
63
73
83
97
103
115
125
137
143
153
163
1713
185
193
207
213
225
237
243
253
2631
275
2813
295
303
313
327
333
343

[3,5,3,3,7,3,3,3,7,3,5,5,7,3,3,3,13,5,3,7,3,5,7,3,
 3,31,5,13,5,3,3,7,3,3]