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A065507 as a simple table

na(n)
13
23
35
43
55
63
77
817
911
107
11109
125
1317
145
155
1621943
1717
187
193
205
217
223
2319
2413

[3,3,5,3,5,3,7,17,11,7,109,5,17,5,5,21943,17,7,3,
 5,7,3,19,13]