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A273569 as a simple table

na(n)
01
15
213
321
437
541
685
793
8125
9117
10209
11209
12253
13209
14421
15429
16493
17453
18641
19609
20685
21549
22985
23969
241061
25941
261273
271161
281261
29929
301861
311869
321997
331893
342273
352177
362317
371989
382873
392793
402949
412637
423289
432985
443149
452373
464265
474217
484405

[1,5,13,21,37,41,85,93,125,117,209,209,253,209,
 421,429,493,453,641,609,685,549,985,969,1061,941,
 1273,1161,1261,929,1861,1869,1997,1893,2273,2177,
 2317,1989,2873,2793,2949,2637,3289,2985,3149,2373,
 4265,4217,4405]