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A040975 as a simple table

na(n)
111
231
341
461
571
6101
7131
8151
9181
10191
11251
12271
13281
14331
15401
16421
17431
18461
19491
20521
21571
22601
23631
24641
25661
26691
27701
28751
29821
30881
31971
32991
331021
341051
351061
361171
371181
381231
391291
401301
411321

[11,31,41,61,71,101,131,151,181,191,251,271,281,
 331,401,421,431,461,491,521,571,601,631,641,661,
 691,701,751,821,881,971,991,1021,1051,1061,1171,
 1181,1231,1291,1301,1321]