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A109981 as a simple table

na(n)
111
223
329
441
543
647
761
867
983
1089
11101
12113
13131
14137
15139
16151
17157
18173
19179
20191
21193
22197
23199
24223
25227
26229
27241
28263
29269
30281
31283
32311
33313
34317
35331
36337
37353
38359
39373
40379
41397
42401
43409
44421
45443
46449
47461
48463
49467
50487
51557
52571
53577
54593

[11,23,29,41,43,47,61,67,83,89,101,113,131,137,
 139,151,157,173,179,191,193,197,199,223,227,229,
 241,263,269,281,283,311,313,317,331,337,353,359,
 373,379,397,401,409,421,443,449,461,463,467,487,
 557,571,577,593]