login

A211972 as a simple table

na(n)
12
23
35
417
541
673
789
897
9137
10193
11257
12281
13313
14409
15521
16569
17577
18641
19673
20761
21929
22953
231033
241049
251153
261289
271409
281657
291721
301801
311913
322081
332113
342297
352593
362713
373137
383257
393361
403449
413617
424129
434153
444217
454481
464513
474729
484793
494993
505113
515153

[2,3,5,17,41,73,89,97,137,193,257,281,313,409,521,
 569,577,641,673,761,929,953,1033,1049,1153,1289,
 1409,1657,1721,1801,1913,2081,2113,2297,2593,2713,
 3137,3257,3361,3449,3617,4129,4153,4217,4481,4513,
 4729,4793,4993,5113,5153]