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A139990 as a simple table

na(n)
173
297
3313
4433
5577
6937
71153
81657
91753
101777
111993
122113
132593
142617
152833
162953
173433
183457
193673
203793
214177
224273
234297
244513
255113
265857
275953
286793
297297
307537
317873
327993
338377
348713
359337
369817
3710177
3810513
3910657
4010993

[73,97,313,433,577,937,1153,1657,1753,1777,1993,
 2113,2593,2617,2833,2953,3433,3457,3673,3793,4177,
 4273,4297,4513,5113,5857,5953,6793,7297,7537,7873,
 7993,8377,8713,9337,9817,10177,10513,10657,10993]