login

A038987 as a simple table

na(n)
12
23
311
431
543
647
753
861
973
1079
1189
1297
13101
14103
15109
16113
17151
18163
19167
20191
21193
22197
23227
24229
25241
26269
27283
28293
29307
30313
31353
32379
33389
34397
35419
36421
37431
38449
39461
40463
41467
42479
43487
44491
45503

[2,3,11,31,43,47,53,61,73,79,89,97,101,103,109,
 113,151,163,167,191,193,197,227,229,241,269,283,
 293,307,313,353,379,389,397,419,421,431,449,461,
 463,467,479,487,491,503]