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A060443 as a simple table

na(n)
00
11
23
37
43
55
631
73
87
9127
103
115
1217
137
1473
153
1611
1731
1823
1989
203
215
227
2313
248191
253
2643
27127
287
2931
30151
313
325
3317
34257
35131071
363
377
3819
3973
40524287
413
425
4311
4431
4541
467
47127
48337
493
5023
5189
52683
5347
54178481
553
565
577
5813
5917
60241

[0,1,3,7,3,5,31,3,7,127,3,5,17,7,73,3,11,31,23,89,
 3,5,7,13,8191,3,43,127,7,31,151,3,5,17,257,131071,
 3,7,19,73,524287,3,5,11,31,41,7,127,337,3,23,89,
 683,47,178481,3,5,7,13,17,241]