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A374964 as a simple table

na(n)
11
21
32
41
55
61
73
81
99
101
1111
121
1313
141
1514
161
1717
181
197
201
2121
221
2323
241
2525
261
273
281
2929
301
316
321
3333
341
3535
361
3737
381
3939
401
4141
421
437
441
4545
461
4718
481
4949
501
5150
521
5353
541
5519
561
5745
581
5959
601
6161
621
637
641
6565
661
6763
681
6944
701
7171
721
7340
741
7512
761
7712
781
7927
801
8181
821
8323
841
8585
861
8758
881
898
901
916
921
939

[1,1,2,1,5,1,3,1,9,1,11,1,13,1,14,1,17,1,7,1,21,1,
 23,1,25,1,3,1,29,1,6,1,33,1,35,1,37,1,39,1,41,1,7,
 1,45,1,18,1,49,1,50,1,53,1,19,1,45,1,59,1,61,1,7,
 1,65,1,63,1,44,1,71,1,40,1,12,1,12,1,27,1,81,1,23,
 1,85,1,58,1,8,1,6,1,9]