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A085613 as a simple table

na(n)
12
23
35
411
517
641
765
8155
9257
10593
111025
122291
134097
148921
1516385
1634955
1765537
18137633
19262145
20543971
211048577
222156201
234194305
248565755
2516777217
2634085873
2767108865
28135812051
29268435457
30541653881
311073741825
322161832555
334294967297
348632981313

[2,3,5,11,17,41,65,155,257,593,1025,2291,4097,
 8921,16385,34955,65537,137633,262145,543971,
 1048577,2156201,4194305,8565755,16777217,34085873,
 67108865,135812051,268435457,541653881,1073741825,
 2161832555,4294967297,8632981313]