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A104160 as a simple table

na(n)
1353
241
3131
4131
5311
61181
7941
81049
91931
102579
113911
124289
134451
146719
158069
1610391
1710589
1812011
1914369
2026591
2131379
2233521
2335339
2441081
2543889
2658271
2759981
2863059
2964679
3066821
31115331
3274759
3377999
3478791
3580051
3680141
3783219
3887071
3994541
4096179

[353,41,131,131,311,1181,941,1049,1931,2579,3911,
 4289,4451,6719,8069,10391,10589,12011,14369,26591,
 31379,33521,35339,41081,43889,58271,59981,63059,
 64679,66821,115331,74759,77999,78791,80051,80141,
 83219,87071,94541,96179]