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A191546 as a simple table

na(n)
13
25
37
41201
513421
628393
722796593
815073
9163
10421
11757241
123512477579761
1379
1429
1524317675453761
16136593761
1721199857783625129028395239857
1837
192494605276120959
2041
2143
2289
23691
2497
25488700001
2653
2717713
284201
2959
30181
312729
32449
3367
34137
3571

[3,5,7,1201,13421,28393,22796593,15073,163,421,
 757241,3512477579761,79,29,24317675453761,
 136593761,21199857783625129028395239857,37,
 2494605276120959,41,43,89,691,97,488700001,53,
 17713,4201,59,181,2729,449,67,137,71]