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A295043 as a simple table

na(n)
01
10
23
37
40
531
60
7127
8217
9381
10889
110
123937
138191
1411811
1527559
1657337
17131071
18253921
19524287
201040257
211777447
224063201
237281799
2416646017
2532247967
2666584449
27116522119
28225735769
29516026527
301073602561
312147483647
324294434817
337515217927
3415032385529

[1,0,3,7,0,31,0,127,217,381,889,0,3937,8191,11811,
 27559,57337,131071,253921,524287,1040257,1777447,
 4063201,7281799,16646017,32247967,66584449,
 116522119,225735769,516026527,1073602561,
 2147483647,4294434817,7515217927,15032385529]