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A291776型作为一个简单的表

n个a(n)
2
7
423
531
6103
7127
8431
9911
101847
116719
1210487
138191
1456999
1541399
16135647
17131071
18560159
19524287
201999871
213982271
225909759
2317512991
2446092239
2546335599
26164460119
27186592247
28736727807
293926707199
304146049487
312147483647
328994904463
3311132323439

[3,7,23,31,103,127,431,911,1847,6719,10487,8191,56999,41399,135647,131071,560159,524287,1999871,3982271,5909759,17512991,46092239,46335599,164460119,186592247,736727807,3926707199,4146049487,2147483647,8994904463,11132323439]