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A343515 as a simple table

na(n)
11
23
33
43
53
63
73
87
97
107
117
127
137
147
1511
1611
1711
1811
1911
2011
2115
2215
2315
2415
2515
2615
2719
2819
2919
3019
3119
3219
3323
3423
3523
3623
3723
3823
3923
4027
4127
4227
4327
4427
4527
4631
4731
4831
4931
5031
5131
5235
5335
5435
5535
5635
5735
5835
5939
6039
6139
6239
6339
6439
6543
6643
6743
6843
6943

[1,3,3,3,3,3,3,7,7,7,7,7,7,7,11,11,11,11,11,11,15,
 15,15,15,15,15,19,19,19,19,19,19,23,23,23,23,23,
 23,23,27,27,27,27,27,27,31,31,31,31,31,31,35,35,
 35,35,35,35,35,39,39,39,39,39,39,43,43,43,43,43]