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A273758 as a simple table

na(n)
01
15
25
317
49
529
617
761
821
965
1053
11105
1265
13137
1481
15233
16109
17217
18129
19337
20173
21313
22257
23429
24317
25497
26341
27645
28393
29701
30469
31777
32697
33733
34705
351005
36689
37845
38841
391165
40929
411233
421109
431213
441101
451241
461325
471521
481657
491693
501553
511885

[1,5,5,17,9,29,17,61,21,65,53,105,65,137,81,233,
 109,217,129,337,173,313,257,429,317,497,341,645,
 393,701,469,777,697,733,705,1005,689,845,841,1165,
 929,1233,1109,1213,1101,1241,1325,1521,1657,1693,
 1553,1885]