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A186281 as a simple table

na(n)
137
243
373
479
5109
6127
7139
8181
9229
10241
11271
12277
13313
14331
15349
16367
17397
18421
19433
20457
21487
22547
23571
24577
25607
26613
27673
28691
29727
30733
31751
32757
33769
34823
35829
36853
37907
38919
39991
401009
411063
421087
431093
441117
451123
461171
471231
481249
491279

[37,43,73,79,109,127,139,181,229,241,271,277,313,
 331,349,367,397,421,433,457,487,547,571,577,607,
 613,673,691,727,733,751,757,769,823,829,853,907,
 919,991,1009,1063,1087,1093,1117,1123,1171,1231,
 1249,1279]