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A139424 as a simple table

na(n)
11
21
31
41
51
643
71
841
953
1091
11317
12317
1343
141
1537
163595
17563
1817239
19911
2011497
2158501
221259
2310283
24138569
2572247
2627733
2711777
28179105

[1,1,1,1,1,43,1,41,53,91,317,317,43,1,37,3595,563,
 17239,911,11497,58501,1259,10283,138569,72247,
 27733,11777,179105]