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A217576 as a simple table

na(n)
11
23
37
429
5121
6765
75041
840913
9363097
103643233
1139916801
12479535185
136227020801
1487203692929
151307676103777
1620924415922433
17355687428096001
186402505760917569
19121645100408832001
202432915176581403649
2151090942299733783937
221124002321128529922049

[1,3,7,29,121,765,5041,40913,363097,3643233,
 39916801,479535185,6227020801,87203692929,
 1307676103777,20924415922433,355687428096001,
 6402505760917569,121645100408832001,
 2432915176581403649,51090942299733783937,
 1124002321128529922049]