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A040969 as a simple table

na(n)
131
241
361
471
5101
6131
7151
8181
9191
10241
11251
12281
13311
14331
15401
16421
17461
18491
19521
20541
21571
22601
23631
24641
25661
26691
27701
28751
29761
30821
31881
32911
33971
34991
351021
361031
371051
381061
391091
401151
411171

[31,41,61,71,101,131,151,181,191,241,251,281,311,
 331,401,421,461,491,521,541,571,601,631,641,661,
 691,701,751,761,821,881,911,971,991,1021,1031,
 1051,1061,1091,1151,1171]