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A028874 as a simple table

na(n)
113
261
397
4193
5397
6673
71021
81153
91597
101933
112113
123361
134093
144621
156397
167393
177741
188461
199601
2012097
2112541
2213921
2315373
2416381
2518493
2619597
2720161
2821313
2926893
3029581
3136097
3237633
3340801
3442433
3543261
3647521
3748397

[13,61,97,193,397,673,1021,1153,1597,1933,2113,
 3361,4093,4621,6397,7393,7741,8461,9601,12097,
 12541,13921,15373,16381,18493,19597,20161,21313,
 26893,29581,36097,37633,40801,42433,43261,47521,
 48397]