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A140899 as a simple table

na(n)
07
19
25
31
43
53
61
75
89
97
107
119
125
131
143
153
161
175
189
197
207
219
225
231
243
253
261
275
289
297
307
319
325
331
343
353
361
375
389
397

[7,9,5,1,3,3,1,5,9,7,7,9,5,1,3,3,1,5,9,7,7,9,5,1,
 3,3,1,5,9,7,7,9,5,1,3,3,1,5,9,7]