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A173826 as a simple table

na(n)
15
237
347
4151
5331
6349
7593
8617
9907
10911
11937
12941
131789
141831
152341
162389
172399
182957
193617
203631
213673
223719
234457
245261
255309
266121
276151
286199
296221
307103
317127
327213
338101
348179
359323
369337
379377
3810529
3910589
4011789
4113007
4213033
4313037

[5,37,47,151,331,349,593,617,907,911,937,941,1789,
 1831,2341,2389,2399,2957,3617,3631,3673,3719,4457,
 5261,5309,6121,6151,6199,6221,7103,7127,7213,8101,
 8179,9323,9337,9377,10529,10589,11789,13007,13033,
 13037]