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A215313 as a simple table

na(n)
12
23
35
423
541
643
759
861
979
1097
11137
12157
13173
14191
15193
16211
17229
18233
19251
20269
21271
22307
23347
24383
25401
26419
27421
28439
29457
30461
31479
32499
33571
34593
35613
36631
37647
38727
39743
40761
41821
42839
43857
44859
45877
46953
47971
48991
491009
501031
511049
521069

[2,3,5,23,41,43,59,61,79,97,137,157,173,191,193,
 211,229,233,251,269,271,307,347,383,401,419,421,
 439,457,461,479,499,571,593,613,631,647,727,743,
 761,821,839,857,859,877,953,971,991,1009,1031,
 1049,1069]