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A239227 as a simple table

na(n)
13
27
311
423
531
643
747
859
9103
10107
11127
12139
13151
14179
15191
16199
17223
18227
19239
20251
21283
22311
23347
24359
25367
26379
27383
28431
29439
30443
31463
32479
33487
34491
35499
36503
37523
38571
39599
40607
41619
42631
43683
44691
45719
46727
47739
48743
49751
50811
51823
52827
53859
54863
55883
56887
57907
58911
59919

[3,7,11,23,31,43,47,59,103,107,127,139,151,179,
 191,199,223,227,239,251,283,311,347,359,367,379,
 383,431,439,443,463,479,487,491,499,503,523,571,
 599,607,619,631,683,691,719,727,739,743,751,811,
 823,827,859,863,883,887,907,911,919]