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A215317 as a simple table

na(n)
12
23
35
423
541
643
759
861
979
1097
11137
12157
13173
14193
15211
16233
17251
18269
19271
20307
21347
22383
23401
24421
25439
26461
27479
28499
29593
30613
31631
32727
33743
34821
35839
36857
37859
38877
39953
40971
41991
421009
431031
441049
451069
461087
471123
481163
491181
501201
511237

[2,3,5,23,41,43,59,61,79,97,137,157,173,193,211,
 233,251,269,271,307,347,383,401,421,439,461,479,
 499,593,613,631,727,743,821,839,857,859,877,953,
 971,991,1009,1031,1049,1069,1087,1123,1163,1181,
 1201,1237]