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A273425 as a simple table

na(n)
01
15
29
317
421
529
637
769
881
989
10105
11129
12149
13189
14221
15285
16301
17285
18289
19329
20381
21413
22469
23477
24501
25541
26593
27697
28745
29849
30905
311061
321213
331173
341133
351149
361225
371345
381385
391469
401521
411565
421733
431853
442013
452133
462253
472589
482705
492653

[1,5,9,17,21,29,37,69,81,89,105,129,149,189,221,
 285,301,285,289,329,381,413,469,477,501,541,593,
 697,745,849,905,1061,1213,1173,1133,1149,1225,
 1345,1385,1469,1521,1565,1733,1853,2013,2133,2253,
 2589,2705,2653]