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A170903 as a simple table

na(n)
11
21
35
41
55
69
713
81
95
109
1113
129
1321
1433
1529
161
175
189
1913
209
2121
2233
2329
249
2521
2633
2737
2841
2977
3097
3161
321
335
349
3513
369
3721
3833
3929
409
4121
4233
4337
4441
4577
4697
4761
489
4921
5033
5137
5241
5377
5497
5569
5641
5777
58105
59117
60161
61253
62257
63125
641
655
669
6713
689
6921
7033
7129
729
7321
7433
7537
7641
7777

[1,1,5,1,5,9,13,1,5,9,13,9,21,33,29,1,5,9,13,9,21,
 33,29,9,21,33,37,41,77,97,61,1,5,9,13,9,21,33,29,
 9,21,33,37,41,77,97,61,9,21,33,37,41,77,97,69,41,
 77,105,117,161,253,257,125,1,5,9,13,9,21,33,29,9,
 21,33,37,41,77]