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A300475 as a simple table

na(n)
11
21
35
41
53
65
79
81
97
103
1111
125
1319
149
1517
161
1715
187
1913
2025
213
2223
2311
2421
255
2619
2737
289
2935
3017
3133
321
3331
3415
3529
367
3727
3853
3913
4025
4149
423
4347
4423
4545
4611
4743
4821
4941
5081
515
5239
5319
5475
5537
569
5771
5835
5969
6017
6167
6233
6365
641
6563
6631
6761
6815
6959
7029
7157

[1,1,5,1,3,5,9,1,7,3,11,5,19,9,17,1,15,7,13,25,3,
 23,11,21,5,19,37,9,35,17,33,1,31,15,29,7,27,53,13,
 25,49,3,47,23,45,11,43,21,41,81,5,39,19,75,37,9,
 71,35,69,17,67,33,65,1,63,31,61,15,59,29,57]