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A201811 as a simple table

na(n)
11
21
33
41
55
67
71
87
913
1019
111
129
1319
1461
1551
161
1711
1825
19151
20221
21141
221
2313
2431
25313
26631
271001
28393
291
3015
3137
32571
331401
344621
354145
361107
371
3817
3943
40949
412651
4215681
4323857
4418733
453139
461
4719
4849
491471
504501
5142821
5290609
53164599
5482381
558953
561
5721
5855
592161

[1,1,3,1,5,7,1,7,13,19,1,9,19,61,51,1,11,25,151,
 221,141,1,13,31,313,631,1001,393,1,15,37,571,1401,
 4621,4145,1107,1,17,43,949,2651,15681,23857,18733,
 3139,1,19,49,1471,4501,42821,90609,164599,82381,
 8953,1,21,55,2161]