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A093179 as a simple table

na(n)
03
15
217
3257
465537
5641
6274177
759649589127497217
81238926361552897
92424833
1045592577
11319489
12114689
132710954639361
14116928085873074369829035993834596371340386703423373313
151214251009
16825753601
1731065037602817
1813631489
1970525124609

[3,5,17,257,65537,641,274177,59649589127497217,
 1238926361552897,2424833,45592577,319489,114689,
 2710954639361,
 11692808587307436982903599383459637134038670342337\
 3313,1214251009,825753601,31065037602817,13631489,
 70525124609]