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A273855 as a simple table

na(n)
01
15
25
317
49
529
621
765
833
969
1069
11141
12129
13201
14233
15325
16309
17337
18353
19465
20525
21649
22673
23789
24825
25937
26989
271169
281257
291421
301453
311677
321657
331729
341777
351945
362053
372261
382405
392625
402705
412829
422901
433181
443285
453557
463709
474017
484041
494145

[1,5,5,17,9,29,21,65,33,69,69,141,129,201,233,325,
 309,337,353,465,525,649,673,789,825,937,989,1169,
 1257,1421,1453,1677,1657,1729,1777,1945,2053,2261,
 2405,2625,2705,2829,2901,3181,3285,3557,3709,4017,
 4041,4145]