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A274432 as a simple table

na(n)
13
25
39
415
517
627
731
845
951
1057
1185
1293
13105
14135
15153
16155
17171
18193
19255
20279
21285
22315
23355
24459
25465
26513
27525
28527
29579
30653
31765
32837
33855
34945
35965
36969
371065
381201
391395
401539
411575
421581
431737
441767
451775
461785
471959
482209
492295
502565
512635

[3,5,9,15,17,27,31,45,51,57,85,93,105,135,153,155,
 171,193,255,279,285,315,355,459,465,513,525,527,
 579,653,765,837,855,945,965,969,1065,1201,1395,
 1539,1575,1581,1737,1767,1775,1785,1959,2209,2295,
 2565,2635]