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A236478 as a simple table

na(n)
12
27
311
419
531
641
7101
8139
9167
10239
11271
12277
13307
14347
15419
16449
17479
18491
19521
20547
21557
22587
23617
24619
25631
26647
27739
28757
29761
30769
31787
32809
33827
34839
35857
36971
37977
38991
391019
401069
411187
421201
431217
441231
451277
461487
471621
481637
491709
501747
511861

[2,7,11,19,31,41,101,139,167,239,271,277,307,347,
 419,449,479,491,521,547,557,587,617,619,631,647,
 739,757,761,769,787,809,827,839,857,971,977,991,
 1019,1069,1187,1201,1217,1231,1277,1487,1621,1637,
 1709,1747,1861]