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A277607 as a simple table

na(n)
15
247
3157
4227
5317
6337
7557
82027
93037
103217
115147
126047
137457
1412527
1513757
1614657
1720357
1821017
1923747
2032057
2135027
2247417
2357047
2484137
25115727
26125627
27127247
28136337
29147137
30149027
31212057
32219937
33225257
34230017
35240047
36242357
37264137
38284117
39304127

[5,47,157,227,317,337,557,2027,3037,3217,5147,
 6047,7457,12527,13757,14657,20357,21017,23747,
 32057,35027,47417,57047,84137,115727,125627,
 127247,136337,147137,149027,212057,219937,225257,
 230017,240047,242357,264137,284117,304127]