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A320024 as a simple table

na(n)
11
23
37
415
531
621
7127
8945
94095
101023
11544635
1246035
138191
14355725
15279279
161796165
175388495
18180213
19131071
20110800305
21249987465
2242833475
233112865
248109585
25524287
269338595
2749198149
28253255275
2922017975903
3013341660255
3130101431815
32709933138551

[1,3,7,15,31,21,127,945,4095,1023,544635,46035,
 8191,355725,279279,1796165,5388495,180213,131071,
 110800305,249987465,42833475,3112865,8109585,
 524287,9338595,49198149,253255275,22017975903,
 13341660255,30101431815,709933138551]