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A221378 as a simple table

na(n)
11
23
33
47
519
67
717
8139
9139
1017
1141
121035
133017
141035
1541
1699
177723
1868006
1968006
207723
2199
22239
2357643
241548941
254616125
261548941
2757643
28239
29577
30430251
3135365731
32318041768
33318041768
3435365731
35430251
36577
371393
383211435
39807887304

[1,3,3,7,19,7,17,139,139,17,41,1035,3017,1035,41,
 99,7723,68006,68006,7723,99,239,57643,1548941,
 4616125,1548941,57643,239,577,430251,35365731,
 318041768,318041768,35365731,430251,577,1393,
 3211435,807887304]