login

A038923 as a simple table

na(n)
13
27
313
417
519
641
743
853
971
1097
11101
12109
13131
14151
15163
16173
17179
18181
19191
20193
21197
22199
23211
24223
25227
26229
27263
28269
29281
30293
31317
32331
33337
34347
35353
36383
37397
38401
39419
40461
41463
42467
43491
44499
45503

[3,7,13,17,19,41,43,53,71,97,101,109,131,151,163,
 173,179,181,191,193,197,199,211,223,227,229,263,
 269,281,293,317,331,337,347,353,383,397,401,419,
 461,463,467,491,499,503]