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A294064 as a simple table

na(n)
15
27
313
435
543
655
777
8127
9133
10155
11167
12253
13287
14295
15365
16475
17497
18533
19595
20713
211007
221177
231483
241805
252323
262575
272723
282927
293107
303415
313487
323823
334145
344213
354367
364565
374717
384927
394963
405125
415215
425363
435417
445587
455627
465795
476133
486587
496797

[5,7,13,35,43,55,77,127,133,155,167,253,287,295,
 365,475,497,533,595,713,1007,1177,1483,1805,2323,
 2575,2723,2927,3107,3415,3487,3823,4145,4213,4367,
 4565,4717,4927,4963,5125,5215,5363,5417,5587,5627,
 5795,6133,6587,6797]