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A140068 as a simple table

na(n)
11
21
31
41
53
61
71
87
94
101
111
1215
1311
146
151
161
1731
1826
1923
207
211
221
2363
2457
2572
2630
279
281
291
30127
31120
32201
33102
3448
3510
361
371
38255
39247
40522
41303
42198
4358
4412
451
461
47511
48502
491291
50825
51699
52256
5382
5413
551
561
571023
581013
593084
602116
612223
62955
63420
6495
6515
661
671
682047
692036

[1,1,1,1,3,1,1,7,4,1,1,15,11,6,1,1,31,26,23,7,1,1,
 63,57,72,30,9,1,1,127,120,201,102,48,10,1,1,255,
 247,522,303,198,58,12,1,1,511,502,1291,825,699,
 256,82,13,1,1,1023,1013,3084,2116,2223,955,420,95,
 15,1,1,2047,2036]