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A048986 as a simple table

na(n)
11
22
33
431
55
611
77
8179
929
1031
1111
1243
1313
1423
1529
1612007
1717
1847
1919
20251
2131
2243
2323
24499
254091
264091
27127
284091
2929
30127
3131
321564237
3359
344079
3547
36367
3737
3883
3961
40383
4141
42179
4343
44499
454091
464091
4747
48683
49127
50173
51113
52173
5353
54191
554091

[1,2,3,31,5,11,7,179,29,31,11,43,13,23,29,12007,
 17,47,19,251,31,43,23,499,4091,4091,127,4091,29,
 127,31,1564237,59,4079,47,367,37,83,61,383,41,179,
 43,499,4091,4091,47,683,127,173,113,173,53,191,
 4091]