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A122271 as a simple table

na(n)
15
27
35
45
57
65
75
811
97
105
115
127
135
145
1513
165
177
185
197
205
215
225
237
245
257
265
2711
285
295
3013
317
325
337
345
3517

[5,7,5,5,7,5,5,11,7,5,5,7,5,5,13,5,7,5,7,5,5,5,7,
 5,7,5,11,5,5,13,7,5,7,5,17]