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A145343 as a simple table

na(n)
22
33
45
513
611
761
823
931
1047
111021
1259
134093
14191
15139
16113
1765521
18179
19262139
20239
21571
223067
234194301
24359
251291
2612281
27887
28953
29268435399
30719
311073741789
32839
339209
34196597
355179
361259
3768719476731
38786431
3936857
401669
411099511627689
422879

[2,3,5,13,11,61,23,31,47,1021,59,4093,191,139,113,
 65521,179,262139,239,571,3067,4194301,359,1291,
 12281,887,953,268435399,719,1073741789,839,9209,
 196597,5179,1259,68719476731,786431,36857,1669,
 1099511627689,2879]