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A372891 as a simple table

na(n)
12
213
397
4193
5241
6673
7769
82689
95953
108929
1112289
1240961
1349921
1461681
15101377
16286721
17414721
18417793
19550801
20786433
211130641
221376257
231489153
241810433
253602561
266942721
277340033
2811304961
2912380161
3015790321
3117047297
3222253377
3339714817
3467411969
3589210881
3693585409
37113246209
38119782433
39152371201
40171048961
41185602561
42377487361
43394783681

[2,13,97,193,241,673,769,2689,5953,8929,12289,
 40961,49921,61681,101377,286721,414721,417793,
 550801,786433,1130641,1376257,1489153,1810433,
 3602561,6942721,7340033,11304961,12380161,
 15790321,17047297,22253377,39714817,67411969,
 89210881,93585409,113246209,119782433,152371201,
 171048961,185602561,377487361,394783681]