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A201606 as a simple table

na(n)
15
2257
31013
42273
530497
636293
790977
8183713
9197573
10326597
11383297
12423617
13533237
14707873
15734837
16790277
171000193
181097717
191199777
201270337
211306373
221379957
231951493
241996097
252086817
262371073
272420213
282570657
293217793

[5,257,1013,2273,30497,36293,90977,183713,197573,
 326597,383297,423617,533237,707873,734837,790277,
 1000193,1097717,1199777,1270337,1306373,1379957,
 1951493,1996097,2086817,2371073,2420213,2570657,
 3217793]