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A175215 as a simple table

na(n)
171
21031
31151
41229
53299
63371
73389
83467
93851
107457
117949
129011
139437
1410007
1510067
1610457
1710889
1811159
1911699
2011717
2111777
2211969
2312071
2412107
2513709
2613757
2714447
2814549
2914591
3015731
3116451
3217207
3317681
3417747
3517909
3618911
3719421
3819541

[71,1031,1151,1229,3299,3371,3389,3467,3851,7457,
 7949,9011,9437,10007,10067,10457,10889,11159,
 11699,11717,11777,11969,12071,12107,13709,13757,
 14447,14549,14591,15731,16451,17207,17681,17747,
 17909,18911,19421,19541]