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A308385 as a simple table

na(n)
11
23
315
429
561
687
7139
8177
9249
10299
11391
12453
13565
14639
15771
16857
171009
181107
191279
201389
211581
221703
231915
242049
252281
262427
272679
282837
293109
303279
313571
323753
334065
344259
354591
364797
375149
385367
395739
405969
416361
426603
437015
447269
457701
467967
478419

[1,3,15,29,61,87,139,177,249,299,391,453,565,639,
 771,857,1009,1107,1279,1389,1581,1703,1915,2049,
 2281,2427,2679,2837,3109,3279,3571,3753,4065,4259,
 4591,4797,5149,5367,5739,5969,6361,6603,7015,7269,
 7701,7967,8419]