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A087878 as a simple table

na(n)
173
2113
3137
4193
5241
6409
7449
8521
9593
10617
11673
12761
13929
14937
15977
161009
171033
181129
191217
201249
211289
221361
231481
241553
251609
261657
271721
281753
291777
301801
311913
321993
332129
342161
352273
362297
372521
382609
392617
402633
412713
422753
432833
442857
452897

[73,113,137,193,241,409,449,521,593,617,673,761,
 929,937,977,1009,1033,1129,1217,1249,1289,1361,
 1481,1553,1609,1657,1721,1753,1777,1801,1913,1993,
 2129,2161,2273,2297,2521,2609,2617,2633,2713,2753,
 2833,2857,2897]