login

A068820 as a simple table

na(n)
12
23
311
413
547
653
797
8131
9197
10241
11409
12431
13607
14673
15739
16751
17983
18991
191103
201433
211489
221531
231553
241709
251721
262371
272393
282447
292633
302789
312833
322897
333041
343109
353217
363371
373373
383527
393547
403593
413671
423691
434057
444153
454211
464297
474363

[2,3,11,13,47,53,97,131,197,241,409,431,607,673,
 739,751,983,991,1103,1433,1489,1531,1553,1709,
 1721,2371,2393,2447,2633,2789,2833,2897,3041,3109,
 3217,3371,3373,3527,3547,3593,3671,3691,4057,4153,
 4211,4297,4363]