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A028867 as a simple table

na(n)
12
23
35
47
511
631
741
843
953
1061
1171
1273
1383
1497
15211
16311
17331
18421
19431
20433
21443
22521
23541
24631
25641
26643
27653
28661
29733
30743
31751
32761
33773
34811
35821
36853
37863
38877
39881
40883
41887
42911
43941
44953
45971
46977
47983
48991
49997
502111
512221
523221

[2,3,5,7,11,31,41,43,53,61,71,73,83,97,211,311,
 331,421,431,433,443,521,541,631,641,643,653,661,
 733,743,751,761,773,811,821,853,863,877,881,883,
 887,911,941,953,971,977,983,991,997,2111,2221,
 3221]