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A208155 as a simple table

na(n)
115
249
391
4133
5217
6259
7301
8427
9469
10511
11553
12679
13721
14763
15889
16973
171015
181057
191099
201141
211267
221351
231393
241477
251561
261603
271687
281897
291939
301981
312107
322149
332191
342317
352359
362443
372569
382611
392653
402779
412863
422947
433031
443073
453199
463241
473409

[15,49,91,133,217,259,301,427,469,511,553,679,721,
 763,889,973,1015,1057,1099,1141,1267,1351,1393,
 1477,1561,1603,1687,1897,1939,1981,2107,2149,2191,
 2317,2359,2443,2569,2611,2653,2779,2863,2947,3031,
 3073,3199,3241,3409]