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A249248 as a simple table

na(n)
11
21
33
41
57
63
71
812
922
103
111
1218
1369
1440
153
161
1725
18159
19241
2061
213
221
2333
24310
25883
26582
2785
283
291
3042
31543
322465
333393
341155
35112
363
371
3852
39882
405798
4113805
429786
432032
44142
453
461
4763
481354
4912110
5044253
5157521
5223368
533294
54175
553
561
5775
581989

[1,1,3,1,7,3,1,12,22,3,1,18,69,40,3,1,25,159,241,
 61,3,1,33,310,883,582,85,3,1,42,543,2465,3393,
 1155,112,3,1,52,882,5798,13805,9786,2032,142,3,1,
 63,1354,12110,44253,57521,23368,3294,175,3,1,75,
 1989]