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A152609 as a simple table

na(n)
11
22
33
47
519
631
791
8373
9931
101931
111933
127193
1311931
1419311
1593119
16311931
17913733
181373313
197331373
209311931
2119311931
2219311933
2371931193
24119311931
25193119311
26931193119
273119311931
289137331373
299311931193

[1,2,3,7,19,31,91,373,931,1931,1933,7193,11931,
 19311,93119,311931,913733,1373313,7331373,9311931,
 19311931,19311933,71931193,119311931,193119311,
 931193119,3119311931,9137331373,9311931193]