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A035089 as a simple table

na(n)
02
13
25
317
417
597
6193
7257
8257
97681
1012289
1112289
1212289
1340961
1465537
1565537
1665537
17786433
18786433
195767169
207340033
2123068673
22104857601
23167772161
24167772161
25167772161
26469762049
272013265921
283221225473
293221225473
303221225473
3175161927681

[2,3,5,17,17,97,193,257,257,7681,12289,12289,
 12289,40961,65537,65537,65537,786433,786433,
 5767169,7340033,23068673,104857601,167772161,
 167772161,167772161,469762049,2013265921,
 3221225473,3221225473,3221225473,75161927681]