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A273288 as a simple table

na(n)
22
33
42
55
62
77
82
93
103
1111
122
1313
143
153
162
1717
183
1919
202
215
225
2323
242
255
267
273
282
2929
303
3131
322
337
347
355
362
3737
387
397
402
4141
423
4343
442
453
4611
4747
482
497
505
517
522
5353
543
557
562
5711
5813
5959
602
6161
6213
633
642
657
663
6767
682
6913
705
7171
722
7373
7419
755
762
777
783
7979
802
813
8219

[2,3,2,5,2,7,2,3,3,11,2,13,3,3,2,17,3,19,2,5,5,23,
 2,5,7,3,2,29,3,31,2,7,7,5,2,37,7,7,2,41,3,43,2,3,
 11,47,2,7,5,7,2,53,3,7,2,11,13,59,2,61,13,3,2,7,3,
 67,2,13,5,71,2,73,19,5,2,7,3,79,2,3,19]