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A074854 as a simple table

na(n)
11
23
35
413
517
657
765
8209
9321
10801
111025
123905
134097
1412417
1521505
1653505
1765537
18233985
19262145
20885761
211327105
223147777
234194305
2416060417
2517825793
2650339841
2784148225
28220217345
29268435457
30990937089
311073741825
323506503681

[1,3,5,13,17,57,65,209,321,801,1025,3905,4097,
 12417,21505,53505,65537,233985,262145,885761,
 1327105,3147777,4194305,16060417,17825793,
 50339841,84148225,220217345,268435457,990937089,
 1073741825,3506503681]