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A047936 as a simple table

na(n)
12
241
3109
4151
5229
6251
7271
8313
9337
10367
11409
12439
13733
14761
15971
16991
171021
181031
191069
201289
211297
221303
231429
241471
251489
261759
271783
281789
291811
301871
311873
321879
332137
342411
352441
362551
372749
382791
392971
403001
413061
423079
433109
443221
453229

[2,41,109,151,229,251,271,313,337,367,409,439,733,
 761,971,991,1021,1031,1069,1289,1297,1303,1429,
 1471,1489,1759,1783,1789,1811,1871,1873,1879,2137,
 2411,2441,2551,2749,2791,2971,3001,3061,3079,3109,
 3221,3229]