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A263721 as a simple table

na(n)
12
23
35
45
57
65
73
85
93
107
1111
127
1311
1413
157
162
1713
1813
195
2017
2113
2211
235
2417
257
2617
2719
283
2917
307
3119
325
3311
3419
3513
3623
375
3817
3919
4013
4123
425
432
4419
4517
4611
475
4823
4929
5029
5123
5219
5329
5413
5531
5631
5723
5811
593
605
6131
6213
632
6429
655
6613
6731
682
6911
705
7131
7237
7323
7437
753
767
7723
783
7913
8031
8119
8237
8341
8411

[2,3,5,5,7,5,3,5,3,7,11,7,11,13,7,2,13,13,5,17,13,
 11,5,17,7,17,19,3,17,7,19,5,11,19,13,23,5,17,19,
 13,23,5,2,19,17,11,5,23,29,29,23,19,29,13,31,31,
 23,11,3,5,31,13,2,29,5,13,31,2,11,5,31,37,23,37,3,
 7,23,3,13,31,19,37,41,11]